1395021252 has 24 divisors (see below), whose sum is σ = 3310221600. Its totient is φ = 457125376.

The previous prime is 1395021239. The next prime is 1395021301. The reversal of 1395021252 is 2521205931.

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, 984477 + ... + 985892.

It is an arithmetic number, because the mean of its divisors is an integer number (137925900).

Almost surely, 2^1395021252 is an apocalyptic number.

1395021252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1395021252 is an abundant number, since it is smaller than the sum of its proper divisors (1915200348).

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

1395021252 is a wasteful number, since it uses less digits than its factorization.

1395021252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970435 (or 1970433 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1395021252 is about 37349.9832931690. The cubic root of 1395021252 is about 1117.3612549896.

The spelling of 1395021252 in words is "one billion, three hundred ninety-five million, twenty-one thousand, two hundred fifty-two".