291002 has 4 divisors (see below), whose sum is σ = 436506. Its totient is φ = 145500.

The previous prime is 290999. The next prime is 291007. The reversal of 291002 is 200192.

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

It can be written as a sum of positive squares in only one way, i.e., 201601 + 89401 = 449^2 + 299^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291002.

It is not an unprimeable number, because it can be changed into a prime (291007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72749 + ... + 72752.

2²⁹¹⁰⁰² is an apocalyptic number.

291002 is a deficient number, since it is larger than the sum of its proper divisors (145504).

291002 is a wasteful number, since it uses less digits than its factorization.

291002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145503.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 291002 is about 539.4460121273. The cubic root of 291002 is about 66.2672056890.

Adding to 291002 its reverse (200192), we get a palindrome (491194).

The spelling of 291002 in words is "two hundred ninety-one thousand, two".