249570445 has 4 divisors (see below), whose sum is σ = 299484540. Its totient is φ = 199656352.

The previous prime is 249570437. The next prime is 249570449. The reversal of 249570445 is 544075942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544075942 = 2 ⋅272037971.

It can be written as a sum of positive squares in 2 ways, for example, as 168948004 + 80622441 = 12998^2 + 8979^2 .

It is a cyclic number.

It is not a de Polignac number, because 249570445 - 2³ = 249570437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249570398 and 249570407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249570449) 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, 24957040 + ... + 24957049.

It is an arithmetic number, because the mean of its divisors is an integer number (74871135).

Almost surely, 2^249570445 is an apocalyptic number.

It is an amenable number.

249570445 is a deficient number, since it is larger than the sum of its proper divisors (49914095).

249570445 is an equidigital number, since it uses as much as digits as its factorization.

249570445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49914094.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 249570445 is about 15797.7987390649. The cubic root of 249570445 is about 629.5995145122.

The spelling of 249570445 in words is "two hundred forty-nine million, five hundred seventy thousand, four hundred forty-five".