2478457 has 8 divisors (see below), whose sum is σ = 2604096. Its totient is φ = 2354352.

The previous prime is 2478449. The next prime is 2478473. The reversal of 2478457 is 7548742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2478457 - 2³ = 2478449 is a prime.

It is a super-2 number, since 2×2478457² = 12285498201698, which contains 22 as substring.

It is a Duffinian number.

2478457 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4258 + ... + 4804.

It is an arithmetic number, because the mean of its divisors is an integer number (325512).

2^2478457 is an apocalyptic number.

It is an amenable number.

2478457 is a deficient number, since it is larger than the sum of its proper divisors (125639).

2478457 is a wasteful number, since it uses less digits than its factorization.

2478457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its digits is 62720, while the sum is 37.

The square root of 2478457 is about 1574.3115955871. The cubic root of 2478457 is about 135.3299109901.

The spelling of 2478457 in words is "two million, four hundred seventy-eight thousand, four hundred fifty-seven".