3172157 has 4 divisors (see below), whose sum is σ = 3175836. Its totient is φ = 3168480.

The previous prime is 3172133. The next prime is 3172159. The reversal of 3172157 is 7512713.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7512713 = 13 ⋅577901.

It can be written as a sum of positive squares in 2 ways, for example, as 1466521 + 1705636 = 1211^2 + 1306^2 .

It is a cyclic number.

It is not a de Polignac number, because 3172157 - 2⁶ = 3172093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3172159) 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, 233 + ... + 2529.

It is an arithmetic number, because the mean of its divisors is an integer number (793959).

Almost surely, 2^3172157 is an apocalyptic number.

It is an amenable number.

3172157 is a deficient number, since it is larger than the sum of its proper divisors (3679).

3172157 is a wasteful number, since it uses less digits than its factorization.

3172157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678.

The product of its digits is 1470, while the sum is 26.

The square root of 3172157 is about 1781.0550244167. The cubic root of 3172157 is about 146.9326206392.

The spelling of 3172157 in words is "three million, one hundred seventy-two thousand, one hundred fifty-seven".