1251540454012 has 48 divisors (see below), whose sum is σ = 2316472704000. Its totient is φ = 590961144384.

The previous prime is 1251540453967. The next prime is 1251540454037. The reversal of 1251540454012 is 2104540451521.

It is a super-2 number, since 2×1251540454012² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217312 + ... + 1596967.

It is an arithmetic number, because the mean of its divisors is an integer number (48259848000).

Almost surely, 2^{1251540454012} is an apocalyptic number.

It is an amenable number.

1251540454012 is a deficient number, since it is larger than the sum of its proper divisors (1064932249988).

1251540454012 is a wasteful number, since it uses less digits than its factorization.

1251540454012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814458 (or 1814456 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 34.

The spelling of 1251540454012 in words is "one trillion, two hundred fifty-one billion, five hundred forty million, four hundred fifty-four thousand, twelve".