402745 has 16 divisors (see below), whose sum is σ = 569088. Its totient is φ = 267840.

The previous prime is 402739. The next prime is 402751. The reversal of 402745 is 547204.

402745 is nontrivially palindromic in base 6.

It is an interprime number because it is at equal distance from previous prime (402739) and next prime (402751).

It is a de Polignac number, because none of the positive numbers 2^k-402745 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1140 + ... + 1450.

It is an arithmetic number, because the mean of its divisors is an integer number (35568).

2⁴⁰²⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

402745 is a deficient number, since it is larger than the sum of its proper divisors (166343).

402745 is a wasteful number, since it uses less digits than its factorization.

402745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 402745 is about 634.6219346981. The cubic root of 402745 is about 73.8487903317.

Adding to 402745 its reverse (547204), we get a palindrome (949949).

The spelling of 402745 in words is "four hundred two thousand, seven hundred forty-five".