1255515212 has 96 divisors (see below), whose sum is σ = 2895782400. Its totient is φ = 463131648.

The previous prime is 1255515203. The next prime is 1255515227. The reversal of 1255515212 is 2125155521.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259883 + ... + 264669.

It is an arithmetic number, because the mean of its divisors is an integer number (30164400).

Almost surely, 2^1255515212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255515212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1447891200).

1255515212 is an abundant number, since it is smaller than the sum of its proper divisors (1640267188).

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

1255515212 is a wasteful number, since it uses less digits than its factorization.

1255515212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863 (or 4861 counting only the distinct ones).

The product of its digits is 5000, while the sum is 29.

The square root of 1255515212 is about 35433.2500908398. The cubic root of 1255515212 is about 1078.7993092015.

The spelling of 1255515212 in words is "one billion, two hundred fifty-five million, five hundred fifteen thousand, two hundred twelve".