921025 has 24 divisors (see below), whose sum is σ = 1378880. Its totient is φ = 596160.

The previous prime is 921013. The next prime is 921029. The reversal of 921025 is 520129.

It is not a de Polignac number, because 921025 - 2¹⁵ = 888257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 920993 and 921011.

It is not an unprimeable number, because it can be changed into a prime (921029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3187 + ... + 3463.

2⁹²¹⁰²⁵ is an apocalyptic number.

921025 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

921025 is a deficient number, since it is larger than the sum of its proper divisors (457855).

921025 is a wasteful number, since it uses less digits than its factorization.

921025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 921025 is about 959.7004741064. The cubic root of 921025 is about 97.2949889099.

It can be divided in two parts, 9 and 21025, that multiplied together give a square (189225 = 435²).

The spelling of 921025 in words is "nine hundred twenty-one thousand, twenty-five".