1387045256 has 16 divisors (see below), whose sum is σ = 2639527440. Its totient is φ = 683171280.

The previous prime is 1387045243. The next prime is 1387045271. The reversal of 1387045256 is 6525407831.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1293350 + ... + 1294421.

It is an arithmetic number, because the mean of its divisors is an integer number (164970465).

Almost surely, 2^1387045256 is an apocalyptic number.

It is an amenable number.

1387045256 is a deficient number, since it is larger than the sum of its proper divisors (1252482184).

1387045256 is a wasteful number, since it uses less digits than its factorization.

1387045256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587844 (or 2587840 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 1387045256 is about 37243.0564803696. The cubic root of 1387045256 is about 1115.2276894301.

The spelling of 1387045256 in words is "one billion, three hundred eighty-seven million, forty-five thousand, two hundred fifty-six".