2478157 has 4 divisors (see below), whose sum is σ = 2703456. Its totient is φ = 2252860.

The previous prime is 2478101. The next prime is 2478173. The reversal of 2478157 is 7518742.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 2478157 - 2⁷ = 2478029 is a prime.

It is a super-2 number, since 2×2478157² = 12282524233298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478187) 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, 112633 + ... + 112654.

It is an arithmetic number, because the mean of its divisors is an integer number (675864).

2^2478157 is an apocalyptic number.

It is an amenable number.

2478157 is a deficient number, since it is larger than the sum of its proper divisors (225299).

2478157 is a wasteful number, since it uses less digits than its factorization.

2478157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225298.

The product of its digits is 15680, while the sum is 34.

The square root of 2478157 is about 1574.2163129634. The cubic root of 2478157 is about 135.3244505212.

The spelling of 2478157 in words is "two million, four hundred seventy-eight thousand, one hundred fifty-seven".