2557746 has 12 divisors (see below), whose sum is σ = 5541822. Its totient is φ = 852576.

The previous prime is 2557741. The next prime is 2557757. The reversal of 2557746 is 6477552.

It can be written as a sum of positive squares in only one way, i.e., 2368521 + 189225 = 1539^2 + 435^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2557746.

It is not an unprimeable number, because it can be changed into a prime (2557741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71031 + ... + 71066.

2^2557746 is an apocalyptic number.

2557746 is an abundant number, since it is smaller than the sum of its proper divisors (2984076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2557746 is a wasteful number, since it uses less digits than its factorization.

2557746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142105 (or 142102 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 2557746 is about 1599.2954698867. The cubic root of 2557746 is about 136.7579151349.

It can be divided in two parts, 255 and 7746, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 2557746 in words is "two million, five hundred fifty-seven thousand, seven hundred forty-six".