1252779512 has 16 divisors (see below), whose sum is σ = 2366109360. Its totient is φ = 621817024.

The previous prime is 1252779491. The next prime is 1252779527. The reversal of 1252779512 is 2159772521.

It is a self number, because there is not a number n which added to its sum of digits gives 1252779512.

It is a congruent number.

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, 570428 + ... + 572619.

It is an arithmetic number, because the mean of its divisors is an integer number (147881835).

Almost surely, 2^1252779512 is an apocalyptic number.

It is an amenable number.

1252779512 is a deficient number, since it is larger than the sum of its proper divisors (1113329848).

1252779512 is a wasteful number, since it uses less digits than its factorization.

1252779512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143190 (or 1143186 counting only the distinct ones).

The product of its digits is 88200, while the sum is 41.

The square root of 1252779512 is about 35394.6254677176. The cubic root of 1252779512 is about 1078.0151908851.

The spelling of 1252779512 in words is "one billion, two hundred fifty-two million, seven hundred seventy-nine thousand, five hundred twelve".