65241861 has 4 divisors (see below), whose sum is σ = 86989152. Its totient is φ = 43494572.

The previous prime is 65241817. The next prime is 65241863. The reversal of 65241861 is 16814256.

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 65241861 - 2⁶ = 65241797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65241863) 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, 10873641 + ... + 10873646.

It is an arithmetic number, because the mean of its divisors is an integer number (21747288).

Almost surely, 2^65241861 is an apocalyptic number.

It is an amenable number.

65241861 is a deficient number, since it is larger than the sum of its proper divisors (21747291).

65241861 is a wasteful number, since it uses less digits than its factorization.

65241861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21747290.

The product of its digits is 11520, while the sum is 33.

The square root of 65241861 is about 8077.2434035381. The cubic root of 65241861 is about 402.5706543662.

It can be divided in two parts, 6524 and 1861, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 65241861 in words is "sixty-five million, two hundred forty-one thousand, eight hundred sixty-one".