402025615 has 4 divisors (see below), whose sum is σ = 482430744. Its totient is φ = 321620488.

The previous prime is 402025597. The next prime is 402025621. The reversal of 402025615 is 516520204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402025615 is a prime.

It is a super-2 number, since 2×402025615² = 323249190232256450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402025615.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40202557 + ... + 40202566.

It is an arithmetic number, because the mean of its divisors is an integer number (120607686).

Almost surely, 2^402025615 is an apocalyptic number.

402025615 is a deficient number, since it is larger than the sum of its proper divisors (80405129).

402025615 is an equidigital number, since it uses as much as digits as its factorization.

402025615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80405128.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 402025615 is about 20050.5764256293. The cubic root of 402025615 is about 738.0479444130.

Adding to 402025615 its reverse (516520204), we get a palindrome (918545819).

The spelling of 402025615 in words is "four hundred two million, twenty-five thousand, six hundred fifteen".