3138915 has 16 divisors (see below), whose sum is σ = 5408928. Its totient is φ = 1545216.

The previous prime is 3138913. The next prime is 3138917. The reversal of 3138915 is 5198313.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3138913) and next prime (3138917).

It is not a de Polignac number, because 3138915 - 2¹ = 3138913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3138911) 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, 7854 + ... + 8243.

It is an arithmetic number, because the mean of its divisors is an integer number (338058).

Almost surely, 2^3138915 is an apocalyptic number.

3138915 is a deficient number, since it is larger than the sum of its proper divisors (2270013).

3138915 is a wasteful number, since it uses less digits than its factorization.

3138915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16118.

The product of its digits is 3240, while the sum is 30.

The square root of 3138915 is about 1771.6983377539. The cubic root of 3138915 is about 146.4175667206.

The spelling of 3138915 in words is "three million, one hundred thirty-eight thousand, nine hundred fifteen".