1242421000 has 32 divisors (see below), whose sum is σ = 2907267480. Its totient is φ = 496968000.

The previous prime is 1242420989. The next prime is 1242421003. The reversal of 1242421000 is 1242421.

It can be written as a sum of positive squares in 4 ways, for example, as 743434756 + 498986244 = 27266^2 + 22338^2 .

It is not an unprimeable number, because it can be changed into a prime (1242421003) 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 7 ways as a sum of consecutive naturals, for example, 620211 + ... + 622210.

Almost surely, 2^1242421000 is an apocalyptic number.

1242421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242421000 is an abundant number, since it is smaller than the sum of its proper divisors (1664846480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242421000 is a wasteful number, since it uses less digits than its factorization.

1242421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242442 (or 1242428 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1242421000 is about 35247.9928506575. The cubic root of 1242421000 is about 1075.0358019445.

Adding to 1242421000 its reverse (1242421), we get a palindrome (1243663421).

1242421000 divided by its reverse (1242421) gives a cube (1000 = 10³).

The spelling of 1242421000 in words is "one billion, two hundred forty-two million, four hundred twenty-one thousand".