2500739 has 4 divisors (see below), whose sum is σ = 2581440. Its totient is φ = 2420040.

The previous prime is 2500733. The next prime is 2500741. The reversal of 2500739 is 9370052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2500739 - 2¹² = 2496643 is a prime.

It is a super-2 number, since 2×2500739² = 12507391092242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40304 + ... + 40365.

It is an arithmetic number, because the mean of its divisors is an integer number (645360).

2^2500739 is an apocalyptic number.

2500739 is a deficient number, since it is larger than the sum of its proper divisors (80701).

2500739 is an equidigital number, since it uses as much as digits as its factorization.

2500739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80700.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 2500739 is about 1581.3725051360. The cubic root of 2500739 is about 135.7342525431.

The spelling of 2500739 in words is "two million, five hundred thousand, seven hundred thirty-nine".