240457 has 4 divisors (see below), whose sum is σ = 274816. Its totient is φ = 206100.

The previous prime is 240437. The next prime is 240473. The reversal of 240457 is 754042.

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, and also an emirpimes, since its reverse is a distinct semiprime: 754042 = 2 ⋅377021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240437) 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, 17169 + ... + 17182.

It is an arithmetic number, because the mean of its divisors is an integer number (68704).

2²⁴⁰⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

240457 is a deficient number, since it is larger than the sum of its proper divisors (34359).

240457 is an equidigital number, since it uses as much as digits as its factorization.

240457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34358.

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

The square root of 240457 is about 490.3641504025. The cubic root of 240457 is about 62.1840696996.

Adding to 240457 its reverse (754042), we get a palindrome (994499).

The spelling of 240457 in words is "two hundred forty thousand, four hundred fifty-seven".