402251 has 4 divisors (see below), whose sum is σ = 412104. Its totient is φ = 392400.

The previous prime is 402239. The next prime is 402253. The reversal of 402251 is 152204.

402251 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402251 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402251.

It is not an unprimeable number, because it can be changed into a prime (402253) 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, 4865 + ... + 4946.

It is an arithmetic number, because the mean of its divisors is an integer number (103026).

2⁴⁰²²⁵¹ is an apocalyptic number.

402251 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

402251 is a deficient number, since it is larger than the sum of its proper divisors (9853).

402251 is an equidigital number, since it uses as much as digits as its factorization.

402251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9852.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 402251 is about 634.2326071718. The cubic root of 402251 is about 73.8185840983.

Adding to 402251 its reverse (152204), we get a palindrome (554455).

Subtracting from 402251 its reverse (152204), we obtain a cube (250047 = 63³).

The spelling of 402251 in words is "four hundred two thousand, two hundred fifty-one".