1025251538 has 16 divisors (see below), whose sum is σ = 1629073944. Its totient is φ = 482254080.

The previous prime is 1025251517. The next prime is 1025251541. The reversal of 1025251538 is 8351525201.

It can be written as a sum of positive squares in 4 ways, for example, as 972005329 + 53246209 = 31177^2 + 7297^2 .

It is a super-2 number, since 2×1025251538² = 2102281432342730888, which contains 22 as substring.

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, 89708 + ... + 100488.

Almost surely, 2^1025251538 is an apocalyptic number.

1025251538 is a deficient number, since it is larger than the sum of its proper divisors (603822406).

1025251538 is a wasteful number, since it uses less digits than its factorization.

1025251538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13597.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 1025251538 is about 32019.5493097576. The cubic root of 1025251538 is about 1008.3473079107.

Adding to 1025251538 its reverse (8351525201), we get a palindrome (9376776739).

The spelling of 1025251538 in words is "one billion, twenty-five million, two hundred fifty-one thousand, five hundred thirty-eight".