64975145 has 8 divisors (see below), whose sum is σ = 80077704. Its totient is φ = 50575104.

The previous prime is 64975121. The next prime is 64975147. The reversal of 64975145 is 54157946.

It can be written as a sum of positive squares in 4 ways, for example, as 37810201 + 27164944 = 6149^2 + 5212^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64975145 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64975147) 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, 175424 + ... + 175793.

It is an arithmetic number, because the mean of its divisors is an integer number (10009713).

Almost surely, 2^64975145 is an apocalyptic number.

It is an amenable number.

64975145 is a deficient number, since it is larger than the sum of its proper divisors (15102559).

64975145 is a wasteful number, since it uses less digits than its factorization.

64975145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351259.

The product of its digits is 151200, while the sum is 41.

The square root of 64975145 is about 8060.7161592504. The cubic root of 64975145 is about 402.0213205362.

The spelling of 64975145 in words is "sixty-four million, nine hundred seventy-five thousand, one hundred forty-five".