1215001255425 has 24 divisors (see below), whose sum is σ = 2009200405920. Its totient is φ = 647872176000.

The previous prime is 1215001255421. The next prime is 1215001255451. The reversal of 1215001255425 is 5245521005121.

It is not a de Polignac number, because 1215001255425 - 2² = 1215001255421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215001255421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1224820 + ... + 1982469.

It is an arithmetic number, because the mean of its divisors is an integer number (83716683580).

Almost surely, 2^{1215001255425} is an apocalyptic number.

1215001255425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215001255425 is a deficient number, since it is larger than the sum of its proper divisors (794199150495).

1215001255425 is a wasteful number, since it uses less digits than its factorization.

1215001255425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212353 (or 3212348 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 33.

The spelling of 1215001255425 in words is "one trillion, two hundred fifteen billion, one million, two hundred fifty-five thousand, four hundred twenty-five".