3945291 has 8 divisors (see below), whose sum is σ = 6011904. Its totient is φ = 2254440.

The previous prime is 3945287. The next prime is 3945299. The reversal of 3945291 is 1925493.

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

It is not a de Polignac number, because 3945291 - 2² = 3945287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3945299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93915 + ... + 93956.

It is an arithmetic number, because the mean of its divisors is an integer number (751488).

Almost surely, 2^3945291 is an apocalyptic number.

3945291 is a deficient number, since it is larger than the sum of its proper divisors (2066613).

3945291 is a wasteful number, since it uses less digits than its factorization.

3945291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187881.

The product of its digits is 9720, while the sum is 33.

The square root of 3945291 is about 1986.2756606272. The cubic root of 3945291 is about 158.0130710759.

The spelling of 3945291 in words is "three million, nine hundred forty-five thousand, two hundred ninety-one".