261402 has 16 divisors (see below), whose sum is σ = 550560. Its totient is φ = 82512.

The previous prime is 261389. The next prime is 261407. The reversal of 261402 is 204162.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261402.

It is not an unprimeable number, because it can be changed into a prime (261407) 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, 1033 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (34410).

2²⁶¹⁴⁰² is an apocalyptic number.

261402 is an abundant number, since it is smaller than the sum of its proper divisors (289158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261402 is a wasteful number, since it uses less digits than its factorization.

261402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317.

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

The square root of 261402 is about 511.2748771454. The cubic root of 261402 is about 63.9395588231.

Adding to 261402 its reverse (204162), we get a palindrome (465564).

The spelling of 261402 in words is "two hundred sixty-one thousand, four hundred two".