401242502 has 4 divisors (see below), whose sum is σ = 601863756. Its totient is φ = 200621250.

The previous prime is 401242487. The next prime is 401242573. The reversal of 401242502 is 205242104.

It is a happy number.

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

It is a super-2 number, since 2×401242502² = 321991090822440008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 100310624 + ... + 100310627.

It is an arithmetic number, because the mean of its divisors is an integer number (150465939).

Almost surely, 2^401242502 is an apocalyptic number.

401242502 is a deficient number, since it is larger than the sum of its proper divisors (200621254).

401242502 is a wasteful number, since it uses less digits than its factorization.

401242502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200621253.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 401242502 is about 20031.0384653417. The cubic root of 401242502 is about 737.5684139158.

Adding to 401242502 its reverse (205242104), we get a palindrome (606484606).

The spelling of 401242502 in words is "four hundred one million, two hundred forty-two thousand, five hundred two".