3123945 has 24 divisors (see below), whose sum is σ = 5908032. Its totient is φ = 1514400.

The previous prime is 3123931. The next prime is 3123959. The reversal of 3123945 is 5493213.

It is an interprime number because it is at equal distance from previous prime (3123931) and next prime (3123959).

It is not a de Polignac number, because 3123945 - 2⁶ = 3123881 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2661 + ... + 3650.

It is an arithmetic number, because the mean of its divisors is an integer number (246168).

Almost surely, 2^3123945 is an apocalyptic number.

It is an amenable number.

3123945 is a deficient number, since it is larger than the sum of its proper divisors (2784087).

3123945 is a wasteful number, since it uses less digits than its factorization.

3123945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6333 (or 6330 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 3123945 is about 1767.4685287156. The cubic root of 3123945 is about 146.1844325857.

It can be divided in two parts, 3123 and 945, that multiplied together give a triangular number (2951235 = T₂₄₂₉).

The spelling of 3123945 in words is "three million, one hundred twenty-three thousand, nine hundred forty-five".