253123445 has 4 divisors (see below), whose sum is σ = 303748140. Its totient is φ = 202498752.

The previous prime is 253123433. The next prime is 253123457. The reversal of 253123445 is 544321352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (253123433) and next prime (253123457).

It can be written as a sum of positive squares in 2 ways, for example, as 38031889 + 215091556 = 6167^2 + 14666^2 .

It is a cyclic number.

It is not a de Polignac number, because 253123445 - 2¹⁴ = 253107061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25312340 + ... + 25312349.

It is an arithmetic number, because the mean of its divisors is an integer number (75937035).

Almost surely, 2^253123445 is an apocalyptic number.

It is an amenable number.

253123445 is a deficient number, since it is larger than the sum of its proper divisors (50624695).

253123445 is an equidigital number, since it uses as much as digits as its factorization.

253123445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50624694.

The product of its digits is 14400, while the sum is 29.

The square root of 253123445 is about 15909.8537076869. The cubic root of 253123445 is about 632.5732036277.

Adding to 253123445 its reverse (544321352), we get a palindrome (797444797).

The spelling of 253123445 in words is "two hundred fifty-three million, one hundred twenty-three thousand, four hundred forty-five".