2400457 has 4 divisors (see below), whose sum is σ = 2404116. Its totient is φ = 2396800.

The previous prime is 2400413. The next prime is 2400469. The reversal of 2400457 is 7540042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1798281 + 602176 = 1341^2 + 776^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400457 - 2⁷ = 2400329 is a prime.

It is an Ulam number.

It is a Duffinian number.

2400457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2400407) 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, 544 + ... + 2257.

It is an arithmetic number, because the mean of its divisors is an integer number (601029).

2^2400457 is an apocalyptic number.

It is an amenable number.

2400457 is a deficient number, since it is larger than the sum of its proper divisors (3659).

2400457 is an equidigital number, since it uses as much as digits as its factorization.

2400457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 2400457 is about 1549.3408275780. The cubic root of 2400457 is about 133.8950875565.

Adding to 2400457 its reverse (7540042), we get a palindrome (9940499).

The spelling of 2400457 in words is "two million, four hundred thousand, four hundred fifty-seven".