642597 has 16 divisors (see below), whose sum is σ = 913920. Its totient is φ = 400752.

The previous prime is 642581. The next prime is 642613. The reversal of 642597 is 795246.

642597 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (642581) and next prime (642613).

It is not a de Polignac number, because 642597 - 2⁴ = 642581 is a prime.

It is a d-powerful number, because it can be written as 6⁵ + 4⁴ + 5⁷ + 2¹³ + 9⁶ + 7⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4554 + ... + 4692.

It is an arithmetic number, because the mean of its divisors is an integer number (57120).

2⁶⁴²⁵⁹⁷ is an apocalyptic number.

642597 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

642597 is a deficient number, since it is larger than the sum of its proper divisors (271323).

642597 is a wasteful number, since it uses less digits than its factorization.

642597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232.

The product of its digits is 15120, while the sum is 33.

The square root of 642597 is about 801.6214817481. The cubic root of 642597 is about 86.2937941845.

The spelling of 642597 in words is "six hundred forty-two thousand, five hundred ninety-seven".