64254191 has 4 divisors (see below), whose sum is σ = 64314072. Its totient is φ = 64194312.

The previous prime is 64254187. The next prime is 64254193. The reversal of 64254191 is 19145246.

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 64254191 - 2² = 64254187 is a prime.

It is a super-2 number, since 2×64254191² = 8257202122128962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64254193) 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, 28301 + ... + 30486.

It is an arithmetic number, because the mean of its divisors is an integer number (16078518).

Almost surely, 2^64254191 is an apocalyptic number.

64254191 is a deficient number, since it is larger than the sum of its proper divisors (59881).

64254191 is a wasteful number, since it uses less digits than its factorization.

64254191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59880.

The product of its digits is 8640, while the sum is 32.

The square root of 64254191 is about 8015.8711940749. The cubic root of 64254191 is about 400.5288650296.

The spelling of 64254191 in words is "sixty-four million, two hundred fifty-four thousand, one hundred ninety-one".