1620525 has 48 divisors (see below), whose sum is σ = 2999808. Its totient is φ = 768000.

The previous prime is 1620523. The next prime is 1620539. The reversal of 1620525 is 5250261.

It is not a de Polignac number, because 1620525 - 2¹ = 1620523 is a prime.

It is a super-2 number, since 2×1620525² = 5252202551250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39505 + ... + 39545.

It is an arithmetic number, because the mean of its divisors is an integer number (62496).

2^1620525 is an apocalyptic number.

1620525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1620525 is a deficient number, since it is larger than the sum of its proper divisors (1379283).

1620525 is a wasteful number, since it uses less digits than its factorization.

1620525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1620525 is about 1272.9984289071. The cubic root of 1620525 is about 117.4587149359.

Adding to 1620525 its reverse (5250261), we get a palindrome (6870786).

It can be divided in two parts, 1620 and 525, that added together give a triangular number (2145 = T₆₅).

The spelling of 1620525 in words is "one million, six hundred twenty thousand, five hundred twenty-five".