4912157 has 4 divisors (see below), whose sum is σ = 5044956. Its totient is φ = 4779360.

The previous prime is 4912151. The next prime is 4912207. The reversal of 4912157 is 7512194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7512194 = 2 ⋅3756097.

It can be written as a sum of positive squares in 2 ways, for example, as 3644281 + 1267876 = 1909^2 + 1126^2 .

It is a cyclic number.

It is not a de Polignac number, because 4912157 - 2⁸ = 4911901 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 (4912151) 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, 66344 + ... + 66417.

It is an arithmetic number, because the mean of its divisors is an integer number (1261239).

Almost surely, 2^4912157 is an apocalyptic number.

It is an amenable number.

4912157 is a deficient number, since it is larger than the sum of its proper divisors (132799).

4912157 is a wasteful number, since it uses less digits than its factorization.

4912157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132798.

The product of its digits is 2520, while the sum is 29.

The square root of 4912157 is about 2216.3386474093. The cubic root of 4912157 is about 169.9902762604.

The spelling of 4912157 in words is "four million, nine hundred twelve thousand, one hundred fifty-seven".