1252818436 has 6 divisors (see below), whose sum is σ = 2192432270. Its totient is φ = 626409216.

The previous prime is 1252818433. The next prime is 1252818491. The reversal of 1252818436 is 6348182521.

It can be written as a sum of positive squares in only one way, i.e., 729324036 + 523494400 = 27006^2 + 22880^2 .

It is not an unprimeable number, because it can be changed into a prime (1252818431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156602301 + ... + 156602308.

Almost surely, 2^1252818436 is an apocalyptic number.

It is an amenable number.

1252818436 is a deficient number, since it is larger than the sum of its proper divisors (939613834).

1252818436 is a wasteful number, since it uses less digits than its factorization.

1252818436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313204613 (or 313204611 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 1252818436 is about 35395.1753209389. The cubic root of 1252818436 is about 1078.0263554538.

The spelling of 1252818436 in words is "one billion, two hundred fifty-two million, eight hundred eighteen thousand, four hundred thirty-six".