65042591 has 2 divisors, whose sum is σ = 65042592. Its totient is φ = 65042590.

The previous prime is 65042587. The next prime is 65042609. The reversal of 65042591 is 19524056.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65042591 - 2² = 65042587 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65042521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32521295 + 32521296.

It is an arithmetic number, because the mean of its divisors is an integer number (32521296).

Almost surely, 2^65042591 is an apocalyptic number.

65042591 is a deficient number, since it is larger than the sum of its proper divisors (1).

65042591 is an equidigital number, since it uses as much as digits as its factorization.

65042591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 65042591 is about 8064.8986974419. The cubic root of 65042591 is about 402.1603755212.

The spelling of 65042591 in words is "sixty-five million, forty-two thousand, five hundred ninety-one".