1252440245 has 12 divisors (see below), whose sum is σ = 1748304684. Its totient is φ = 858816000.

The previous prime is 1252440199. The next prime is 1252440251. The reversal of 1252440245 is 5420442521.

It can be written as a sum of positive squares in 2 ways, for example, as 591024721 + 661415524 = 24311^2 + 25718^2 .

It is not a de Polignac number, because 1252440245 - 2⁶ = 1252440181 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2555756 + ... + 2556245.

It is an arithmetic number, because the mean of its divisors is an integer number (145692057).

Almost surely, 2^1252440245 is an apocalyptic number.

It is an amenable number.

1252440245 is a deficient number, since it is larger than the sum of its proper divisors (495864439).

1252440245 is an equidigital number, since it uses as much as digits as its factorization.

1252440245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112020 (or 5112013 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 1252440245 is about 35389.8325087870. The cubic root of 1252440245 is about 1077.9178691574.

Adding to 1252440245 its reverse (5420442521), we get a palindrome (6672882766).

The spelling of 1252440245 in words is "one billion, two hundred fifty-two million, four hundred forty thousand, two hundred forty-five".