3921725 has 12 divisors (see below), whose sum is σ = 4913376. Its totient is φ = 3104880.

The previous prime is 3921721. The next prime is 3921761. The reversal of 3921725 is 5271293.

It is not a de Polignac number, because 3921725 - 2² = 3921721 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1814 + ... + 3336.

It is an arithmetic number, because the mean of its divisors is an integer number (409448).

Almost surely, 2^3921725 is an apocalyptic number.

It is an amenable number.

3921725 is a deficient number, since it is larger than the sum of its proper divisors (991651).

3921725 is a wasteful number, since it uses less digits than its factorization.

3921725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636 (or 1631 counting only the distinct ones).

The product of its digits is 3780, while the sum is 29.

The square root of 3921725 is about 1980.3345676930. The cubic root of 3921725 is about 157.6978281751.

The spelling of 3921725 in words is "three million, nine hundred twenty-one thousand, seven hundred twenty-five".