402097 has 4 divisors (see below), whose sum is σ = 423280. Its totient is φ = 380916.

The previous prime is 402091. The next prime is 402107. The reversal of 402097 is 790204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402097 - 2³ = 402089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402091) 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, 10563 + ... + 10600.

It is an arithmetic number, because the mean of its divisors is an integer number (105820).

2⁴⁰²⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

402097 is a deficient number, since it is larger than the sum of its proper divisors (21183).

402097 is a wasteful number, since it uses less digits than its factorization.

402097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21182.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 402097 is about 634.1111889882. Note that the first 4 decimals coincide. The cubic root of 402097 is about 73.8091625240.

The spelling of 402097 in words is "four hundred two thousand, ninety-seven".