65021961 has 8 divisors (see below), whose sum is σ = 87278400. Its totient is φ = 43056752.

The previous prime is 65021921. The next prime is 65021963. The reversal of 65021961 is 16912056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65021961 - 2⁷ = 65021833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65021963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72285 + ... + 73178.

It is an arithmetic number, because the mean of its divisors is an integer number (10909800).

Almost surely, 2^65021961 is an apocalyptic number.

It is an amenable number.

65021961 is a deficient number, since it is larger than the sum of its proper divisors (22256439).

65021961 is a wasteful number, since it uses less digits than its factorization.

65021961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145615.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 65021961 is about 8063.6195966824. The cubic root of 65021961 is about 402.1178523799.

The spelling of 65021961 in words is "sixty-five million, twenty-one thousand, nine hundred sixty-one".