402047271 has 24 divisors (see below), whose sum is σ = 615429360. Its totient is φ = 252470400.

The previous prime is 402047251. The next prime is 402047273. The reversal of 402047271 is 172740204.

It is a happy number.

It is not a de Polignac number, because 402047271 - 2¹⁸ = 401785127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402047273) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 8085 + ... + 29486.

It is an arithmetic number, because the mean of its divisors is an integer number (25642890).

Almost surely, 2^402047271 is an apocalyptic number.

402047271 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

402047271 is a deficient number, since it is larger than the sum of its proper divisors (213382089).

402047271 is a wasteful number, since it uses less digits than its factorization.

402047271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37647 (or 37644 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 402047271 is about 20051.1164527066. The cubic root of 402047271 is about 738.0611963707.

Adding to 402047271 its reverse (172740204), we get a palindrome (574787475).

The spelling of 402047271 in words is "four hundred two million, forty-seven thousand, two hundred seventy-one".