402945 has 8 divisors (see below), whose sum is σ = 644736. Its totient is φ = 214896.

The previous prime is 402943. The next prime is 402947. The reversal of 402945 is 549204.

It is an interprime number because it is at equal distance from previous prime (402943) and next prime (402947).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402945 - 2¹ = 402943 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13417 + ... + 13446.

It is an arithmetic number, because the mean of its divisors is an integer number (80592).

2⁴⁰²⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

402945 is a deficient number, since it is larger than the sum of its proper divisors (241791).

402945 is a wasteful number, since it uses less digits than its factorization.

402945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26871.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 402945 is about 634.7794892717. The cubic root of 402945 is about 73.8610125516.

The spelling of 402945 in words is "four hundred two thousand, nine hundred forty-five".