1620252 has 18 divisors (see below), whose sum is σ = 4095728. Its totient is φ = 540072.

The previous prime is 1620251. The next prime is 1620257. The reversal of 1620252 is 2520261.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22468 + ... + 22539.

2^1620252 is an apocalyptic number.

1620252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1620252 is an abundant number, since it is smaller than the sum of its proper divisors (2475476).

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

1620252 is a wasteful number, since it uses less digits than its factorization.

1620252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45017 (or 45012 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1620252 is about 1272.8911972356. The cubic root of 1620252 is about 117.4521187134.

Subtracting 1620252 from its reverse (2520261), we obtain a palindrome (900009).

The spelling of 1620252 in words is "one million, six hundred twenty thousand, two hundred fifty-two".