2557903 has 8 divisors (see below), whose sum is σ = 2668160. Its totient is φ = 2449440.

The previous prime is 2557901. The next prime is 2557909. The reversal of 2557903 is 3097552.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2557903 - 2¹ = 2557901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3001 + ... + 3757.

It is an arithmetic number, because the mean of its divisors is an integer number (333520).

2^2557903 is an apocalyptic number.

2557903 is a deficient number, since it is larger than the sum of its proper divisors (110257).

2557903 is a wasteful number, since it uses less digits than its factorization.

2557903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 2557903 is about 1599.3445532467. The cubic root of 2557903 is about 136.7607132435.

The spelling of 2557903 in words is "two million, five hundred fifty-seven thousand, nine hundred three".