402427 has 4 divisors (see below), whose sum is σ = 406296. Its totient is φ = 398560.

The previous prime is 402419. The next prime is 402443. The reversal of 402427 is 724204.

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 402427 - 2³ = 402419 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (402487) 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, 1774 + ... + 1987.

It is an arithmetic number, because the mean of its divisors is an integer number (101574).

2⁴⁰²⁴²⁷ is an apocalyptic number.

402427 is a deficient number, since it is larger than the sum of its proper divisors (3869).

402427 is a wasteful number, since it uses less digits than its factorization.

402427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868.

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

The square root of 402427 is about 634.3713423540. The cubic root of 402427 is about 73.8293486677.

The spelling of 402427 in words is "four hundred two thousand, four hundred twenty-seven", and thus it is an iban number.