405020471 has 2 divisors, whose sum is σ = 405020472. Its totient is φ = 405020470.

The previous prime is 405020453. The next prime is 405020477. The reversal of 405020471 is 174020504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405020471 is a prime.

It is a super-3 number, since 3×405020471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405020477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202510235 + 202510236.

It is an arithmetic number, because the mean of its divisors is an integer number (202510236).

Almost surely, 2^405020471 is an apocalyptic number.

405020471 is a deficient number, since it is larger than the sum of its proper divisors (1).

405020471 is an equidigital number, since it uses as much as digits as its factorization.

405020471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 405020471 is about 20125.1203971554. The cubic root of 405020471 is about 739.8760877255.

Adding to 405020471 its reverse (174020504), we get a palindrome (579040975).

The spelling of 405020471 in words is "four hundred five million, twenty thousand, four hundred seventy-one".