1242332421 has 32 divisors (see below), whose sum is σ = 1887995520. Its totient is φ = 719712000.

The previous prime is 1242332401. The next prime is 1242332437.

It is a happy number.

1242332421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1242332421 - 2⁵ = 1242332389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242332391 and 1242332400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242332401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90231 + ... + 103083.

It is an arithmetic number, because the mean of its divisors is an integer number (58999860).

Almost surely, 2^1242332421 is an apocalyptic number.

1242332421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1242332421 is a deficient number, since it is larger than the sum of its proper divisors (645663099).

1242332421 is a wasteful number, since it uses less digits than its factorization.

1242332421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12997.

The product of its digits is 2304, while the sum is 24.

The square root of 1242332421 is about 35246.7363169982. The cubic root of 1242332421 is about 1075.0102529399.

It can be divided in two parts, 12423 and 32421, that added together give a palindrome (44844).

The spelling of 1242332421 in words is "one billion, two hundred forty-two million, three hundred thirty-two thousand, four hundred twenty-one".