3925491 has 4 divisors (see below), whose sum is σ = 5233992. Its totient is φ = 2616992.

The previous prime is 3925489. The next prime is 3925541. The reversal of 3925491 is 1945293.

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

It is a cyclic number.

It is not a de Polignac number, because 3925491 - 2¹ = 3925489 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3925421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654246 + ... + 654251.

It is an arithmetic number, because the mean of its divisors is an integer number (1308498).

Almost surely, 2^3925491 is an apocalyptic number.

3925491 is a deficient number, since it is larger than the sum of its proper divisors (1308501).

3925491 is a wasteful number, since it uses less digits than its factorization.

3925491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308500.

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

The square root of 3925491 is about 1981.2851889620. The cubic root of 3925491 is about 157.7482906646.

The spelling of 3925491 in words is "three million, nine hundred twenty-five thousand, four hundred ninety-one".