249572573 has 4 divisors (see below), whose sum is σ = 249913788. Its totient is φ = 249231360.

The previous prime is 249572569. The next prime is 249572623. The reversal of 249572573 is 375275942.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 375275942 = 2 ⋅187637971.

It can be written as a sum of positive squares in 2 ways, for example, as 136936804 + 112635769 = 11702^2 + 10613^2 .

It is a cyclic number.

It is not a de Polignac number, because 249572573 - 2² = 249572569 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 (249572503) 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, 169508 + ... + 170973.

It is an arithmetic number, because the mean of its divisors is an integer number (62478447).

Almost surely, 2^249572573 is an apocalyptic number.

It is an amenable number.

249572573 is a deficient number, since it is larger than the sum of its proper divisors (341215).

249572573 is an equidigital number, since it uses as much as digits as its factorization.

249572573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341214.

The product of its digits is 529200, while the sum is 44.

The square root of 249572573 is about 15797.8660900768. The cubic root of 249572573 is about 629.6013039655.

The spelling of 249572573 in words is "two hundred forty-nine million, five hundred seventy-two thousand, five hundred seventy-three".