402705671 has 4 divisors (see below), whose sum is σ = 406269552. Its totient is φ = 399141792.

The previous prime is 402705617. The next prime is 402705683. The reversal of 402705671 is 176507204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402705671 - 2²² = 398511367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402705691) 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, 1781771 + ... + 1781996.

It is an arithmetic number, because the mean of its divisors is an integer number (101567388).

Almost surely, 2^402705671 is an apocalyptic number.

402705671 is a deficient number, since it is larger than the sum of its proper divisors (3563881).

402705671 is a wasteful number, since it uses less digits than its factorization.

402705671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563880.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 402705671 is about 20067.5277749901. The cubic root of 402705671 is about 738.4638641718.

The spelling of 402705671 in words is "four hundred two million, seven hundred five thousand, six hundred seventy-one".