402520471 has 4 divisors (see below), whose sum is σ = 402563952. Its totient is φ = 402476992.

The previous prime is 402520457. The next prime is 402520483. The reversal of 402520471 is 174025204.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 402520471 - 2¹⁹ = 401996183 is a prime.

It is a super-3 number, since 3×402520471³ (a number of 27 digits) contains 333 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 (402520421) 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, 1690 + ... + 28423.

It is an arithmetic number, because the mean of its divisors is an integer number (100640988).

Almost surely, 2^402520471 is an apocalyptic number.

402520471 is a deficient number, since it is larger than the sum of its proper divisors (43481).

402520471 is a wasteful number, since it uses less digits than its factorization.

402520471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43480.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 402520471 is about 20062.9128244131. The cubic root of 402520471 is about 738.3506429549.

Adding to 402520471 its reverse (174025204), we get a palindrome (576545675).

The spelling of 402520471 in words is "four hundred two million, five hundred twenty thousand, four hundred seventy-one".