402261 has 4 divisors (see below), whose sum is σ = 536352. Its totient is φ = 268172.

The previous prime is 402253. The next prime is 402263. The reversal of 402261 is 162204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402261 - 2³ = 402253 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 402261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402263) 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, 67041 + ... + 67046.

It is an arithmetic number, because the mean of its divisors is an integer number (134088).

2⁴⁰²²⁶¹ is an apocalyptic number.

It is an amenable number.

402261 is a deficient number, since it is larger than the sum of its proper divisors (134091).

402261 is a wasteful number, since it uses less digits than its factorization.

402261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134090.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 402261 is about 634.2404906658. The cubic root of 402261 is about 73.8191958057.

Adding to 402261 its reverse (162204), we get a palindrome (564465).

The spelling of 402261 in words is "four hundred two thousand, two hundred sixty-one".