2597021407 has 4 divisors (see below), whose sum is σ = 2599873056. Its totient is φ = 2594169760.

The previous prime is 2597021393. The next prime is 2597021411. The reversal of 2597021407 is 7041207952.

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 2597021407 - 2¹⁹ = 2596497119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2597021417) 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, 1424458 + ... + 1426279.

It is an arithmetic number, because the mean of its divisors is an integer number (649968264).

Almost surely, 2^2597021407 is an apocalyptic number.

2597021407 is a deficient number, since it is larger than the sum of its proper divisors (2851649).

2597021407 is an equidigital number, since it uses as much as digits as its factorization.

2597021407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851648.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 2597021407 is about 50960.9792586445. The cubic root of 2597021407 is about 1374.5435676442.

The spelling of 2597021407 in words is "two billion, five hundred ninety-seven million, twenty-one thousand, four hundred seven".