3921149 has 4 divisors (see below), whose sum is σ = 4027164. Its totient is φ = 3815136.

The previous prime is 3921143. The next prime is 3921161. The reversal of 3921149 is 9411293.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2829124 + 1092025 = 1682^2 + 1045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3921149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921143) 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, 52952 + ... + 53025.

It is an arithmetic number, because the mean of its divisors is an integer number (1006791).

Almost surely, 2^3921149 is an apocalyptic number.

It is an amenable number.

3921149 is a deficient number, since it is larger than the sum of its proper divisors (106015).

3921149 is a wasteful number, since it uses less digits than its factorization.

3921149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106014.

The product of its digits is 1944, while the sum is 29.

The square root of 3921149 is about 1980.1891323810. The cubic root of 3921149 is about 157.6901072193.

The spelling of 3921149 in words is "three million, nine hundred twenty-one thousand, one hundred forty-nine".