1252111520 has 48 divisors (see below), whose sum is σ = 3227037408. Its totient is φ = 455312640.

The previous prime is 1252111519. The next prime is 1252111543. The reversal of 1252111520 is 251112521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1252111492 and 1252111501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353954 + ... + 357473.

It is an arithmetic number, because the mean of its divisors is an integer number (67229946).

Almost surely, 2^1252111520 is an apocalyptic number.

1252111520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252111520 is an abundant number, since it is smaller than the sum of its proper divisors (1974925888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252111520 is a wasteful number, since it uses less digits than its factorization.

1252111520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711453 (or 711445 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1252111520 is about 35385.1878615898. The cubic root of 1252111520 is about 1077.8235547291.

The spelling of 1252111520 in words is "one billion, two hundred fifty-two million, one hundred eleven thousand, five hundred twenty".