2403257 has 4 divisors (see below), whose sum is σ = 2407140. Its totient is φ = 2399376.

The previous prime is 2403229. The next prime is 2403263. The reversal of 2403257 is 7523042.

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 274576 + 2128681 = 524^2 + 1459^2 .

It is a cyclic number.

It is not a de Polignac number, because 2403257 - 2¹⁰ = 2402233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2403277) 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, 782 + ... + 2327.

It is an arithmetic number, because the mean of its divisors is an integer number (601785).

2^2403257 is an apocalyptic number.

It is an amenable number.

2403257 is a deficient number, since it is larger than the sum of its proper divisors (3883).

2403257 is an equidigital number, since it uses as much as digits as its factorization.

2403257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3882.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 2403257 is about 1550.2441743158. The cubic root of 2403257 is about 133.9471277264.

Adding to 2403257 its reverse (7523042), we get a palindrome (9926299).

The spelling of 2403257 in words is "two million, four hundred three thousand, two hundred fifty-seven".