21032025 has 72 divisors (see below), whose sum is σ = 41559840. Its totient is φ = 9354240.

The previous prime is 21032023. The next prime is 21032059. The reversal of 21032025 is 52023012.

21032025 = 631² + 632² + ... + 679².

It is not a de Polignac number, because 21032025 - 2¹ = 21032023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 21031995 and 21032013.

It is not an unprimeable number, because it can be changed into a prime (21032023) 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 71 ways as a sum of consecutive naturals, for example, 216777 + ... + 216873.

It is an arithmetic number, because the mean of its divisors is an integer number (577220).

Almost surely, 2^21032025 is an apocalyptic number.

21032025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21032025 is a deficient number, since it is larger than the sum of its proper divisors (20527815).

21032025 is a wasteful number, since it uses less digits than its factorization.

21032025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 21032025 is about 4586.0685777690. The cubic root of 21032025 is about 276.0325917194.

Adding to 21032025 its reverse (52023012), we get a palindrome (73055037).

The spelling of 21032025 in words is "twenty-one million, thirty-two thousand, twenty-five".