402542263 has 4 divisors (see below), whose sum is σ = 411107040. Its totient is φ = 393977488.

The previous prime is 402542249. The next prime is 402542279. The reversal of 402542263 is 362245204.

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-402542263 is a prime.

It is a super-2 number, since 2×402542263² = 324080547002322338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402542863) 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, 4282318 + ... + 4282411.

It is an arithmetic number, because the mean of its divisors is an integer number (102776760).

Almost surely, 2^402542263 is an apocalyptic number.

402542263 is a deficient number, since it is larger than the sum of its proper divisors (8564777).

402542263 is an equidigital number, since it uses as much as digits as its factorization.

402542263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8564776.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 402542263 is about 20063.4559086913. The cubic root of 402542263 is about 738.3639672021.

Adding to 402542263 its reverse (362245204), we get a palindrome (764787467).

The spelling of 402542263 in words is "four hundred two million, five hundred forty-two thousand, two hundred sixty-three".