61291 has 2 divisors, whose sum is σ = 61292. Its totient is φ = 61290.

The previous prime is 61283. The next prime is 61297. The reversal of 61291 is 19216.

61291 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61291 - 2³ = 61283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30645 + 30646.

It is an arithmetic number, because the mean of its divisors is an integer number (30646).

2⁶¹²⁹¹ is an apocalyptic number.

61291 is a deficient number, since it is larger than the sum of its proper divisors (1).

61291 is an equidigital number, since it uses as much as digits as its factorization.

61291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 19.

The square root of 61291 is about 247.5701920668. The cubic root of 61291 is about 39.4274693134.

It can be divided in two parts, 612 and 91, that added together give a triangular number (703 = T₃₇).

The spelling of 61291 in words is "sixty-one thousand, two hundred ninety-one".