2521257 has 8 divisors (see below), whose sum is σ = 3372480. Its totient is φ = 1675440.

The previous prime is 2521249. The next prime is 2521271. The reversal of 2521257 is 7521252.

2521257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2521257 - 2³ = 2521249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94 + ... + 2247.

It is an arithmetic number, because the mean of its divisors is an integer number (421560).

2^2521257 is an apocalyptic number.

It is an amenable number.

2521257 is a deficient number, since it is larger than the sum of its proper divisors (851223).

2521257 is a wasteful number, since it uses less digits than its factorization.

2521257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703.

The product of its digits is 1400, while the sum is 24.

The square root of 2521257 is about 1587.8466550647. The cubic root of 2521257 is about 136.1044648644.

The spelling of 2521257 in words is "two million, five hundred twenty-one thousand, two hundred fifty-seven".