212409025 has 12 divisors (see below), whose sum is σ = 274839552. Its totient is φ = 162538640.

The previous prime is 212409013. The next prime is 212409031. The reversal of 212409025 is 520904212.

It is not a de Polignac number, because 212409025 - 2⁹ = 212408513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184129 + ... + 185278.

It is an arithmetic number, because the mean of its divisors is an integer number (22903296).

Almost surely, 2^212409025 is an apocalyptic number.

212409025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212409025 is a deficient number, since it is larger than the sum of its proper divisors (62430527).

212409025 is a wasteful number, since it uses less digits than its factorization.

212409025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369440 (or 369435 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 212409025 is about 14574.2589863087. The cubic root of 212409025 is about 596.6564252722.

The spelling of 212409025 in words is "two hundred twelve million, four hundred nine thousand, twenty-five".