402147225 has 36 divisors (see below), whose sum is σ = 726710556. Its totient is φ = 212567040.

The previous prime is 402147211. The next prime is 402147227. The reversal of 402147225 is 522741204.

It can be written as a sum of positive squares in 6 ways, for example, as 23299929 + 378847296 = 4827^2 + 19464^2 .

It is not a de Polignac number, because 402147225 - 2¹³ = 402139033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402147227) 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, 17517 + ... + 33333.

Almost surely, 2^402147225 is an apocalyptic number.

402147225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402147225 is a deficient number, since it is larger than the sum of its proper divisors (324563331).

402147225 is a wasteful number, since it uses less digits than its factorization.

402147225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15946 (or 15938 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 402147225 is about 20053.6087774744. The cubic root of 402147225 is about 738.1223550631.

Adding to 402147225 its reverse (522741204), we get a palindrome (924888429).

The spelling of 402147225 in words is "four hundred two million, one hundred forty-seven thousand, two hundred twenty-five".