11801597 has 4 divisors (see below), whose sum is σ = 11812416. Its totient is φ = 11790780.

The previous prime is 11801567. The next prime is 11801611. The reversal of 11801597 is 79510811.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11801597 - 2⁸ = 11801341 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 (11801567) 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, 3563 + ... + 6024.

It is an arithmetic number, because the mean of its divisors is an integer number (2953104).

Almost surely, 2^11801597 is an apocalyptic number.

It is an amenable number.

11801597 is a deficient number, since it is larger than the sum of its proper divisors (10819).

11801597 is an equidigital number, since it uses as much as digits as its factorization.

11801597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10818.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 11801597 is about 3435.3452519361. The cubic root of 11801597 is about 227.6740816292.

The spelling of 11801597 in words is "eleven million, eight hundred one thousand, five hundred ninety-seven".