4947157 has 4 divisors (see below), whose sum is σ = 4953676. Its totient is φ = 4940640.

The previous prime is 4947143. The next prime is 4947167. The reversal of 4947157 is 7517494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7517494 = 2 ⋅3758747.

It can be written as a sum of positive squares in 2 ways, for example, as 4626801 + 320356 = 2151^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 4947157 - 2⁷ = 4947029 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 (4947167) 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, 1944 + ... + 3697.

It is an arithmetic number, because the mean of its divisors is an integer number (1238419).

Almost surely, 2^4947157 is an apocalyptic number.

It is an amenable number.

4947157 is a deficient number, since it is larger than the sum of its proper divisors (6519).

4947157 is an equidigital number, since it uses as much as digits as its factorization.

4947157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6518.

The product of its digits is 35280, while the sum is 37.

The square root of 4947157 is about 2224.2205376266. The cubic root of 4947157 is about 170.3930582116.

The spelling of 4947157 in words is "four million, nine hundred forty-seven thousand, one hundred fifty-seven".