291402 has 12 divisors (see below), whose sum is σ = 631410. Its totient is φ = 97128.

The previous prime is 291377. The next prime is 291419. The reversal of 291402 is 204192.

291402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 251001 + 40401 = 501^2 + 201^2 .

It is a super-3 number, since 3×291402³ = 74233312293770424, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 16189 = 291402 / (2 + 9 + 1 + 4 + 0 + 2).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291402.

It is an unprimeable number.

291402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8077 + ... + 8112.

2²⁹¹⁴⁰² is an apocalyptic number.

291402 is an abundant number, since it is smaller than the sum of its proper divisors (340008).

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

291402 is a wasteful number, since it uses less digits than its factorization.

291402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16197 (or 16194 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 291402 is about 539.8166355347. The cubic root of 291402 is about 66.2975545599.

Adding to 291402 its reverse (204192), we get a palindrome (495594).

It can be divided in two parts, 29 and 1402, that added together give a triangular number (1431 = T₅₃).

The spelling of 291402 in words is "two hundred ninety-one thousand, four hundred two".