402247 has 4 divisors (see below), whose sum is σ = 419760. Its totient is φ = 384736.

The previous prime is 402239. The next prime is 402253. The reversal of 402247 is 742204.

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 402247 - 2³ = 402239 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 (402277) 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, 8722 + ... + 8767.

It is an arithmetic number, because the mean of its divisors is an integer number (104940).

2⁴⁰²²⁴⁷ is an apocalyptic number.

402247 is a deficient number, since it is larger than the sum of its proper divisors (17513).

402247 is a wasteful number, since it uses less digits than its factorization.

402247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17512.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 402247 is about 634.2294537468. The cubic root of 402247 is about 73.8183394125.

The spelling of 402247 in words is "four hundred two thousand, two hundred forty-seven", and thus it is an iban number.