1381381504 has 16 divisors (see below), whose sum is σ = 2751971220. Its totient is φ = 690690688.

The previous prime is 1381381499. The next prime is 1381381511. The reversal of 1381381504 is 4051831831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 1381381504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5395894 + ... + 5396149.

Almost surely, 2^1381381504 is an apocalyptic number.

It is an amenable number.

1381381504 is a deficient number, since it is larger than the sum of its proper divisors (1370589716).

1381381504 is an equidigital number, since it uses as much as digits as its factorization.

1381381504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10792057 (or 10792045 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1381381504 is about 37166.9410094509. The cubic root of 1381381504 is about 1113.7076741683.

The spelling of 1381381504 in words is "one billion, three hundred eighty-one million, three hundred eighty-one thousand, five hundred four".