161370252 has 96 divisors (see below), whose sum is σ = 436029440. Its totient is φ = 51554880.

The previous prime is 161370247. The next prime is 161370269. The reversal of 161370252 is 252073161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 525483 + ... + 525789.

Almost surely, 2^161370252 is an apocalyptic number.

161370252 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 161370252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218014720).

161370252 is an abundant number, since it is smaller than the sum of its proper divisors (274659188).

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

161370252 is a wasteful number, since it uses less digits than its factorization.

161370252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 161370252 is about 12703.1591346405. The cubic root of 161370252 is about 544.4288852172.

The spelling of 161370252 in words is "one hundred sixty-one million, three hundred seventy thousand, two hundred fifty-two".