1251486942 has 32 divisors (see below), whose sum is σ = 2525022720. Its totient is φ = 413501760.

The previous prime is 1251486931. The next prime is 1251486949. The reversal of 1251486942 is 2496841521.

It is a super-2 number, since 2×1251486942² = 3132439131993022728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1251486894 and 1251486903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251486949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420034 + ... + 423002.

It is an arithmetic number, because the mean of its divisors is an integer number (78906960).

Almost surely, 2^1251486942 is an apocalyptic number.

1251486942 is an abundant number, since it is smaller than the sum of its proper divisors (1273535778).

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

1251486942 is a wasteful number, since it uses less digits than its factorization.

1251486942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568.

The product of its digits is 138240, while the sum is 42.

The square root of 1251486942 is about 35376.3613448303. The cubic root of 1251486942 is about 1077.6443116843.

The spelling of 1251486942 in words is "one billion, two hundred fifty-one million, four hundred eighty-six thousand, nine hundred forty-two".