1387535025 has 24 divisors (see below), whose sum is σ = 2305727424. Its totient is φ = 736254400.

The previous prime is 1387534943. The next prime is 1387535029. The reversal of 1387535025 is 5205357831.

It is not a de Polignac number, because 1387535025 - 2⁸ = 1387534769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1387535029) 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, 32181 + ... + 61730.

It is an arithmetic number, because the mean of its divisors is an integer number (96071976).

Almost surely, 2^1387535025 is an apocalyptic number.

1387535025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1387535025 is a deficient number, since it is larger than the sum of its proper divisors (918192399).

1387535025 is a wasteful number, since it uses less digits than its factorization.

1387535025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94121 (or 94116 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 1387535025 is about 37249.6312062281. The cubic root of 1387535025 is about 1115.3589371722.

The spelling of 1387535025 in words is "one billion, three hundred eighty-seven million, five hundred thirty-five thousand, twenty-five".