402025 has 12 divisors (see below), whose sum is σ = 537292. Its totient is φ = 296640.

The previous prime is 402023. The next prime is 402029. The reversal of 402025 is 520204.

402025 = 64² + 65² + ... + 113².

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 16384 + 385641 = 128^2 + 621^2 .

It is not a de Polignac number, because 402025 - 2¹ = 402023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

402025 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 401996 and 402014.

It is not an unprimeable number, because it can be changed into a prime (402023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294 + ... + 943.

2⁴⁰²⁰²⁵ is an apocalyptic number.

It is an amenable number.

402025 is a deficient number, since it is larger than the sum of its proper divisors (135267).

402025 is a wasteful number, since it uses less digits than its factorization.

402025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 402025 is about 634.0544140687. The cubic root of 402025 is about 73.8047568069.

Adding to 402025 its reverse (520204), we get a palindrome (922229).

The spelling of 402025 in words is "four hundred two thousand, twenty-five".