65142091 has 16 divisors (see below), whose sum is σ = 77414400. Its totient is φ = 53631648.

The previous prime is 65142073. The next prime is 65142097. The reversal of 65142091 is 19024156.

It is not a de Polignac number, because 65142091 - 2¹⁵ = 65109323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65142097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44550 + ... + 45988.

It is an arithmetic number, because the mean of its divisors is an integer number (4838400).

Almost surely, 2^65142091 is an apocalyptic number.

65142091 is a deficient number, since it is larger than the sum of its proper divisors (12272309).

65142091 is a wasteful number, since it uses less digits than its factorization.

65142091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 65142091 is about 8071.0650474395. The cubic root of 65142091 is about 402.3653415778.

It can be divided in two parts, 651420 and 91, that added together give a triangular number (651511 = T₁₁₄₁).

The spelling of 65142091 in words is "sixty-five million, one hundred forty-two thousand, ninety-one".