2156475 has 12 divisors (see below), whose sum is σ = 3565496. Its totient is φ = 1150080.

The previous prime is 2156461. The next prime is 2156491. The reversal of 2156475 is 5746512.

It is not a de Polignac number, because 2156475 - 2⁴ = 2156459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14302 + ... + 14451.

2^2156475 is an apocalyptic number.

2156475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2156475 is a deficient number, since it is larger than the sum of its proper divisors (1409021).

2156475 is a wasteful number, since it uses less digits than its factorization.

2156475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28766 (or 28761 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 2156475 is about 1468.4941266481. The cubic root of 2156475 is about 129.1957247608.

The spelling of 2156475 in words is "two million, one hundred fifty-six thousand, four hundred seventy-five".