1381231602 has 40 divisors (see below), whose sum is σ = 3117298800. Its totient is φ = 457090776.

The previous prime is 1381231529. The next prime is 1381231669. The reversal of 1381231602 is 2061321831.

It is a happy number.

1381231602 is a `hidden beast` number, since 1 + 38 + 1 + 23 + 1 + 602 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8152 + ... + 53187.

It is an arithmetic number, because the mean of its divisors is an integer number (77932470).

Almost surely, 2^1381231602 is an apocalyptic number.

1381231602 is an abundant number, since it is smaller than the sum of its proper divisors (1736067198).

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

1381231602 is a wasteful number, since it uses less digits than its factorization.

1381231602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61492 (or 61483 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1381231602 is about 37164.9243507908. The cubic root of 1381231602 is about 1113.6673876757.

The spelling of 1381231602 in words is "one billion, three hundred eighty-one million, two hundred thirty-one thousand, six hundred two".