402205725 has 36 divisors (see below), whose sum is σ = 739880596. Its totient is φ = 208707840.

The previous prime is 402205721. The next prime is 402205733. The reversal of 402205725 is 527502204.

It can be written as a sum of positive squares in 6 ways, for example, as 363609 + 401842116 = 603^2 + 20046^2 .

It is not a de Polignac number, because 402205725 - 2² = 402205721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402205721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15832 + ... + 32481.

Almost surely, 2^402205725 is an apocalyptic number.

402205725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402205725 is a deficient number, since it is larger than the sum of its proper divisors (337674871).

402205725 is a wasteful number, since it uses less digits than its factorization.

402205725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48366 (or 48358 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 402205725 is about 20055.0673147711. The cubic root of 402205725 is about 738.1581446624.

Adding to 402205725 its reverse (527502204), we get a palindrome (929707929).

The spelling of 402205725 in words is "four hundred two million, two hundred five thousand, seven hundred twenty-five".