1001521254252 has 72 divisors (see below), whose sum is σ = 2485336757904. Its totient is φ = 313835184128.

The previous prime is 1001521254203. The next prime is 1001521254263. The reversal of 1001521254252 is 2524521251001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2803588 + ... + 3140564.

It is an arithmetic number, because the mean of its divisors is an integer number (34518566082).

Almost surely, 2^{1001521254252} is an apocalyptic number.

1001521254252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001521254252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1242668378952).

1001521254252 is an abundant number, since it is smaller than the sum of its proper divisors (1483815503652).

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

1001521254252 is a wasteful number, since it uses less digits than its factorization.

1001521254252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337875 (or 337856 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 1001521254252 in words is "one trillion, one billion, five hundred twenty-one million, two hundred fifty-four thousand, two hundred fifty-two".