3957945 has 8 divisors (see below), whose sum is σ = 6332736. Its totient is φ = 2110896.

The previous prime is 3957937. The next prime is 3957953. The reversal of 3957945 is 5497593.

It is an interprime number because it is at equal distance from previous prime (3957937) and next prime (3957953).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3957945 - 2³ = 3957937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3957897 and 3957906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131917 + ... + 131946.

It is an arithmetic number, because the mean of its divisors is an integer number (791592).

Almost surely, 2^3957945 is an apocalyptic number.

It is an amenable number.

3957945 is a deficient number, since it is larger than the sum of its proper divisors (2374791).

3957945 is a wasteful number, since it uses less digits than its factorization.

3957945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263871.

The product of its digits is 170100, while the sum is 42.

The square root of 3957945 is about 1989.4584690312. The cubic root of 3957945 is about 158.1818261389.

The spelling of 3957945 in words is "three million, nine hundred fifty-seven thousand, nine hundred forty-five".