1242002421 has 24 divisors (see below), whose sum is σ = 2009995104. Its totient is φ = 732382560.

The previous prime is 1242002413. The next prime is 1242002429.

1242002421 is a `hidden beast` number, since 1 + 2 + 420 + 0 + 242 + 1 = 666.

1242002421 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1242002413) and next prime (1242002429).

It is not a de Polignac number, because 1242002421 - 2³ = 1242002413 is a prime.

It is a super-2 number, since 2×1242002421² = 3085140027539722482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242002394 and 1242002403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242002429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165871 + ... + 173196.

It is an arithmetic number, because the mean of its divisors is an integer number (83749796).

Almost surely, 2^1242002421 is an apocalyptic number.

1242002421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1242002421 is a deficient number, since it is larger than the sum of its proper divisors (767992683).

1242002421 is a wasteful number, since it uses less digits than its factorization.

1242002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339121 (or 339118 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1242002421 is about 35242.0547215965. The cubic root of 1242002421 is about 1074.9150597390.

It can be divided in two parts, 124200 and 2421, that added together give a palindrome (126621).

The spelling of 1242002421 in words is "one billion, two hundred forty-two million, two thousand, four hundred twenty-one".