291461 has 4 divisors (see below), whose sum is σ = 292992. Its totient is φ = 289932.

The previous prime is 291457. The next prime is 291481. The reversal of 291461 is 164192.

It is a happy number.

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 291461 - 2² = 291457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291481) 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, 431 + ... + 876.

It is an arithmetic number, because the mean of its divisors is an integer number (73248).

2²⁹¹⁴⁶¹ is an apocalyptic number.

It is an amenable number.

291461 is a deficient number, since it is larger than the sum of its proper divisors (1531).

291461 is a wasteful number, since it uses less digits than its factorization.

291461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530.

The product of its digits is 432, while the sum is 23.

The square root of 291461 is about 539.8712809550. The cubic root of 291461 is about 66.3020286676.

The spelling of 291461 in words is "two hundred ninety-one thousand, four hundred sixty-one".