2315906 has 4 divisors (see below), whose sum is σ = 3473862. Its totient is φ = 1157952.

The previous prime is 2315903. The next prime is 2315947. The reversal of 2315906 is 6095132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1985281 + 330625 = 1409^2 + 575^2 .

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2315903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578975 + ... + 578978.

2^2315906 is an apocalyptic number.

2315906 is a deficient number, since it is larger than the sum of its proper divisors (1157956).

2315906 is a wasteful number, since it uses less digits than its factorization.

2315906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157955.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2315906 is about 1521.8101064193. The cubic root of 2315906 is about 132.3042035143.

The spelling of 2315906 in words is "two million, three hundred fifteen thousand, nine hundred six".