402402071 has 2 divisors, whose sum is σ = 402402072. Its totient is φ = 402402070.

The previous prime is 402402029. The next prime is 402402073. The reversal of 402402071 is 170204204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402402071 is a prime.

Together with 402402073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402402073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201201035 + 201201036.

It is an arithmetic number, because the mean of its divisors is an integer number (201201036).

Almost surely, 2^402402071 is an apocalyptic number.

402402071 is a deficient number, since it is larger than the sum of its proper divisors (1).

402402071 is an equidigital number, since it uses as much as digits as its factorization.

402402071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 402402071 is about 20059.9618892958. The cubic root of 402402071 is about 738.2782414289.

Adding to 402402071 its reverse (170204204), we get a palindrome (572606275).

The spelling of 402402071 in words is "four hundred two million, four hundred two thousand, seventy-one".