1251344042 has 32 divisors (see below), whose sum is σ = 2053900800. Its totient is φ = 568309248.

The previous prime is 1251344023. The next prime is 1251344069. The reversal of 1251344042 is 2404431521.

It is a super-2 number, since 2×1251344042² = 3131723822897795528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 736538 + ... + 738234.

It is an arithmetic number, because the mean of its divisors is an integer number (64184400).

Almost surely, 2^1251344042 is an apocalyptic number.

1251344042 is a deficient number, since it is larger than the sum of its proper divisors (802556758).

1251344042 is a wasteful number, since it uses less digits than its factorization.

1251344042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1251344042 is about 35374.3415769114. The cubic root of 1251344042 is about 1077.6032934820.

Adding to 1251344042 its reverse (2404431521), we get a palindrome (3655775563).

The spelling of 1251344042 in words is "one billion, two hundred fifty-one million, three hundred forty-four thousand, forty-two".