2545731 has 12 divisors (see below), whose sum is σ = 3767400. Its totient is φ = 1655520.

The previous prime is 2545727. The next prime is 2545757. The reversal of 2545731 is 1375452.

It is a happy number.

It is not a de Polignac number, because 2545731 - 2² = 2545727 is a prime.

It is a super-2 number, since 2×2545731² = 12961492648722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2545695 and 2545704.

It is not an unprimeable number, because it can be changed into a prime (2545771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3081 + ... + 3818.

It is an arithmetic number, because the mean of its divisors is an integer number (313950).

2^2545731 is an apocalyptic number.

2545731 is a deficient number, since it is larger than the sum of its proper divisors (1221669).

2545731 is a wasteful number, since it uses less digits than its factorization.

2545731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6946 (or 6943 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 2545731 is about 1595.5347066109. The cubic root of 2545731 is about 136.5434390588.

The spelling of 2545731 in words is "two million, five hundred forty-five thousand, seven hundred thirty-one".