402542351 has 4 divisors (see below), whose sum is σ = 413421912. Its totient is φ = 391662792.

The previous prime is 402542333. The next prime is 402542353. The reversal of 402542351 is 153245204.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 402542351 - 2¹⁰ = 402541327 is a prime.

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 402542351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402542353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5439725 + ... + 5439798.

It is an arithmetic number, because the mean of its divisors is an integer number (103355478).

Almost surely, 2^402542351 is an apocalyptic number.

402542351 is a deficient number, since it is larger than the sum of its proper divisors (10879561).

402542351 is a wasteful number, since it uses less digits than its factorization.

402542351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10879560.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 402542351 is about 20063.4581017331. The cubic root of 402542351 is about 738.3640210068.

Adding to 402542351 its reverse (153245204), we get a palindrome (555787555).

The spelling of 402542351 in words is "four hundred two million, five hundred forty-two thousand, three hundred fifty-one".