2557501 has 2 divisors, whose sum is σ = 2557502. Its totient is φ = 2557500.

The previous prime is 2557453. The next prime is 2557507. The reversal of 2557501 is 1057552.

It is a happy number.

2557501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1692601 + 864900 = 1301^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557501 - 2¹¹ = 2555453 is a prime.

It is a super-2 number, since 2×2557501² = 13081622730002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557507) 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 as a sum of consecutive naturals, namely, 1278750 + 1278751.

It is an arithmetic number, because the mean of its divisors is an integer number (1278751).

2^2557501 is an apocalyptic number.

It is an amenable number.

2557501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557501 is an equidigital number, since it uses as much as digits as its factorization.

2557501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 2557501 is about 1599.2188718246. The cubic root of 2557501 is about 136.7535484309.

The spelling of 2557501 in words is "two million, five hundred fifty-seven thousand, five hundred one".