1252664438 has 24 divisors (see below), whose sum is σ = 1913280096. Its totient is φ = 615081600.

The previous prime is 1252664437. The next prime is 1252664443. The reversal of 1252664438 is 8344662521.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1252664395 and 1252664404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252664437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4622243 + ... + 4622513.

It is an arithmetic number, because the mean of its divisors is an integer number (79720004).

Almost surely, 2^1252664438 is an apocalyptic number.

1252664438 is a deficient number, since it is larger than the sum of its proper divisors (660615658).

1252664438 is a wasteful number, since it uses less digits than its factorization.

1252664438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 567 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 1252664438 is about 35392.9998446020. Note that the first 3 decimals coincide. The cubic root of 1252664438 is about 1077.9821828638.

The spelling of 1252664438 in words is "one billion, two hundred fifty-two million, six hundred sixty-four thousand, four hundred thirty-eight".