1372505381 has 16 divisors (see below), whose sum is σ = 1579979520. Its totient is φ = 1182276480.

The previous prime is 1372505369. The next prime is 1372505447. The reversal of 1372505381 is 1835052731.

It is a cyclic number.

It is not a de Polignac number, because 1372505381 - 2¹⁸ = 1372243237 is a prime.

It is a super-2 number, since 2×1372505381² = 3767542041747910322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1372505341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43721 + ... + 68238.

It is an arithmetic number, because the mean of its divisors is an integer number (98748720).

Almost surely, 2^1372505381 is an apocalyptic number.

It is an amenable number.

1372505381 is a deficient number, since it is larger than the sum of its proper divisors (207474139).

1372505381 is a wasteful number, since it uses less digits than its factorization.

1372505381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112036.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 1372505381 is about 37047.3397290548. The cubic root of 1372505381 is about 1111.3171553996.

The spelling of 1372505381 in words is "one billion, three hundred seventy-two million, five hundred five thousand, three hundred eighty-one".