402102634 has 4 divisors (see below), whose sum is σ = 603153954. Its totient is φ = 201051316.

The previous prime is 402102619. The next prime is 402102637. The reversal of 402102634 is 436201204.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 309654409 + 92448225 = 17597^2 + 9615^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (402102637) by changing a digit.

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 as a sum of consecutive naturals, namely, 100525657 + ... + 100525660.

Almost surely, 2^402102634 is an apocalyptic number.

402102634 is a deficient number, since it is larger than the sum of its proper divisors (201051320).

402102634 is a wasteful number, since it uses less digits than its factorization.

402102634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201051319.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 402102634 is about 20052.4969517514. The cubic root of 402102634 is about 738.0950724922.

Adding to 402102634 its reverse (436201204), we get a palindrome (838303838).

The spelling of 402102634 in words is "four hundred two million, one hundred two thousand, six hundred thirty-four".