64542235 has 4 divisors (see below), whose sum is σ = 77450688. Its totient is φ = 51633784.

The previous prime is 64542227. The next prime is 64542253. The reversal of 64542235 is 53224546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64542235 - 2³ = 64542227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64542197 and 64542206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6454219 + ... + 6454228.

It is an arithmetic number, because the mean of its divisors is an integer number (19362672).

Almost surely, 2^64542235 is an apocalyptic number.

64542235 is a deficient number, since it is larger than the sum of its proper divisors (12908453).

64542235 is a wasteful number, since it uses less digits than its factorization.

64542235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12908452.

The product of its digits is 28800, while the sum is 31.

The square root of 64542235 is about 8033.8182080503. The cubic root of 64542235 is about 401.1264808741.

The spelling of 64542235 in words is "sixty-four million, five hundred forty-two thousand, two hundred thirty-five".