2597661 has 24 divisors (see below), whose sum is σ = 4311840. Its totient is φ = 1490400.

The previous prime is 2597641. The next prime is 2597663. The reversal of 2597661 is 1667952.

2597661 is a `hidden beast` number, since 2 + 597 + 6 + 61 = 666.

It is not a de Polignac number, because 2597661 - 2⁵ = 2597629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2597663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1191 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (179660).

2^2597661 is an apocalyptic number.

It is an amenable number.

2597661 is a deficient number, since it is larger than the sum of its proper divisors (1714179).

2597661 is a wasteful number, since it uses less digits than its factorization.

2597661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417 (or 1414 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 2597661 is about 1611.7260933546. The cubic root of 2597661 is about 137.4656398993.

The spelling of 2597661 in words is "two million, five hundred ninety-seven thousand, six hundred sixty-one".