1025401315521 has 32 divisors (see below), whose sum is σ = 1540471726080. Its totient is φ = 601070025600.

The previous prime is 1025401315517. The next prime is 1025401315559. The reversal of 1025401315521 is 1255131045201.

It is not a de Polignac number, because 1025401315521 - 2² = 1025401315517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025401315501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1542925 + ... + 2105093.

It is an arithmetic number, because the mean of its divisors is an integer number (48139741440).

Almost surely, 2^{1025401315521} is an apocalyptic number.

1025401315521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1025401315521 is a deficient number, since it is larger than the sum of its proper divisors (515070410559).

1025401315521 is a wasteful number, since it uses less digits than its factorization.

1025401315521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563997.

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 1025401315521 in words is "one trillion, twenty-five billion, four hundred one million, three hundred fifteen thousand, five hundred twenty-one".