402279 has 4 divisors (see below), whose sum is σ = 536376. Its totient is φ = 268184.

The previous prime is 402277. The next prime is 402299. The reversal of 402279 is 972204.

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 402279 - 2¹ = 402277 is a prime.

It is a super-3 number, since 3×402279³ = 195300493337890917, which contains 333 as substring.

It is a D-number.

402279 is a lucky number.

It is a plaindrome in base 13.

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, 67044 + ... + 67049.

It is an arithmetic number, because the mean of its divisors is an integer number (134094).

2⁴⁰²²⁷⁹ is an apocalyptic number.

402279 is a deficient number, since it is larger than the sum of its proper divisors (134097).

402279 is a wasteful number, since it uses less digits than its factorization.

402279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134096.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 402279 is about 634.2546807080. The cubic root of 402279 is about 73.8202968534.

The spelling of 402279 in words is "four hundred two thousand, two hundred seventy-nine".