1025401587 has 32 divisors (see below), whose sum is σ = 1598400000. Its totient is φ = 584476704.

The previous prime is 1025401579. The next prime is 1025401603. The reversal of 1025401587 is 7851045201.

It is not a de Polignac number, because 1025401587 - 2³ = 1025401579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025406587) 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, 512473 + ... + 514469.

It is an arithmetic number, because the mean of its divisors is an integer number (49950000).

Almost surely, 2^1025401587 is an apocalyptic number.

1025401587 is a deficient number, since it is larger than the sum of its proper divisors (572998413).

1025401587 is an equidigital number, since it uses as much as digits as its factorization.

1025401587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520 (or 2506 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 1025401587 is about 32021.8923082319. The cubic root of 1025401587 is about 1008.3964971808.

Adding to 1025401587 its reverse (7851045201), we get a palindrome (8876446788).

The spelling of 1025401587 in words is "one billion, twenty-five million, four hundred one thousand, five hundred eighty-seven".