3921137 has 4 divisors (see below), whose sum is σ = 4277616. Its totient is φ = 3564660.

The previous prime is 3921121. The next prime is 3921139. The reversal of 3921137 is 7311293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7311293 = 11 ⋅664663.

It is not a de Polignac number, because 3921137 - 2⁴ = 3921121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921139) 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, 178223 + ... + 178244.

It is an arithmetic number, because the mean of its divisors is an integer number (1069404).

Almost surely, 2^3921137 is an apocalyptic number.

It is an amenable number.

3921137 is a deficient number, since it is larger than the sum of its proper divisors (356479).

3921137 is a wasteful number, since it uses less digits than its factorization.

3921137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356478.

The product of its digits is 1134, while the sum is 26.

The square root of 3921137 is about 1980.1861023651. The cubic root of 3921137 is about 157.6899463580.

The spelling of 3921137 in words is "three million, nine hundred twenty-one thousand, one hundred thirty-seven".