1250523221 has 4 divisors (see below), whose sum is σ = 1258011552. Its totient is φ = 1243034892.

The previous prime is 1250523217. The next prime is 1250523233. The reversal of 1250523221 is 1223250521.

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 an emirpimes, since its reverse is a distinct semiprime: 1223250521 = 17 ⋅71955913.

It is a cyclic number.

It is not a de Polignac number, because 1250523221 - 2² = 1250523217 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 (1250528221) 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, 3743915 + ... + 3744248.

It is an arithmetic number, because the mean of its divisors is an integer number (314502888).

Almost surely, 2^1250523221 is an apocalyptic number.

It is an amenable number.

1250523221 is a deficient number, since it is larger than the sum of its proper divisors (7488331).

1250523221 is an equidigital number, since it uses as much as digits as its factorization.

1250523221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7488330.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1250523221 is about 35362.7377475218. The cubic root of 1250523221 is about 1077.3676234466.

Adding to 1250523221 its reverse (1223250521), we get a palindrome (2473773742).

The spelling of 1250523221 in words is "one billion, two hundred fifty million, five hundred twenty-three thousand, two hundred twenty-one".