1252651378 has 8 divisors (see below), whose sum is σ = 2049793200. Its totient is φ = 569386980.

The previous prime is 1252651357. The next prime is 1252651403. The reversal of 1252651378 is 8731562521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1252651378³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1252651378.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28469328 + ... + 28469371.

It is an arithmetic number, because the mean of its divisors is an integer number (256224150).

Almost surely, 2^1252651378 is an apocalyptic number.

1252651378 is a deficient number, since it is larger than the sum of its proper divisors (797141822).

1252651378 is a wasteful number, since it uses less digits than its factorization.

1252651378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56938712.

The product of its digits is 100800, while the sum is 40.

The square root of 1252651378 is about 35392.8153443605. The cubic root of 1252651378 is about 1077.9784365835.

The spelling of 1252651378 in words is "one billion, two hundred fifty-two million, six hundred fifty-one thousand, three hundred seventy-eight".