2501609 has 4 divisors (see below), whose sum is σ = 2729040. Its totient is φ = 2274180.

The previous prime is 2501599. The next prime is 2501623. The reversal of 2501609 is 9061052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2501609 - 2⁴ = 2501593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501689) 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, 113699 + ... + 113720.

It is an arithmetic number, because the mean of its divisors is an integer number (682260).

2^2501609 is an apocalyptic number.

It is an amenable number.

2501609 is a deficient number, since it is larger than the sum of its proper divisors (227431).

2501609 is a wasteful number, since it uses less digits than its factorization.

2501609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227430.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 2501609 is about 1581.6475587184. The cubic root of 2501609 is about 135.7499912385.

The spelling of 2501609 in words is "two million, five hundred one thousand, six hundred nine".