1251512471292 has 24 divisors (see below), whose sum is σ = 2920440652752. Its totient is φ = 417135840000.

The previous prime is 1251512471273. The next prime is 1251512471329. The reversal of 1251512471292 is 2921742151521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4223709 + ... + 4510292.

It is an arithmetic number, because the mean of its divisors is an integer number (121685027198).

Almost surely, 2^{1251512471292} is an apocalyptic number.

1251512471292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251512471292 is an abundant number, since it is smaller than the sum of its proper divisors (1668928181460).

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

1251512471292 is a wasteful number, since it uses less digits than its factorization.

1251512471292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8745949 (or 8745947 counting only the distinct ones).

The product of its digits is 100800, while the sum is 42.

The spelling of 1251512471292 in words is "one trillion, two hundred fifty-one billion, five hundred twelve million, four hundred seventy-one thousand, two hundred ninety-two".