1375861256 has 32 divisors (see below), whose sum is σ = 3216300480. Its totient is φ = 536049600.

The previous prime is 1375861237. The next prime is 1375861273. The reversal of 1375861256 is 6521685731.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116155 + ... + 1117386.

It is an arithmetic number, because the mean of its divisors is an integer number (100509390).

Almost surely, 2^1375861256 is an apocalyptic number.

It is an amenable number.

1375861256 is an abundant number, since it is smaller than the sum of its proper divisors (1840439224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1375861256 is a wasteful number, since it uses less digits than its factorization.

1375861256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233565 (or 2233561 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The square root of 1375861256 is about 37092.6037910525. The cubic root of 1375861256 is about 1112.2221684868. Note that the first 3 decimals are identical.

The spelling of 1375861256 in words is "one billion, three hundred seventy-five million, eight hundred sixty-one thousand, two hundred fifty-six".