65125537 has 4 divisors (see below), whose sum is σ = 65222980. Its totient is φ = 65028096.

The previous prime is 65125523. The next prime is 65125573. The reversal of 65125537 is 73552156.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26635921 + 38489616 = 5161^2 + 6204^2 .

It is a 4-Lehmer number, since φ(65125537) divides (65125537-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 65125537 - 2¹¹ = 65123489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65125517) 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, 47712 + ... + 49057.

It is an arithmetic number, because the mean of its divisors is an integer number (16305745).

Almost surely, 2^65125537 is an apocalyptic number.

It is an amenable number.

65125537 is a deficient number, since it is larger than the sum of its proper divisors (97443).

65125537 is an equidigital number, since it uses as much as digits as its factorization.

65125537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97442.

The product of its digits is 31500, while the sum is 34.

The square root of 65125537 is about 8070.0394670658. The cubic root of 65125537 is about 402.3312554744.

The spelling of 65125537 in words is "sixty-five million, one hundred twenty-five thousand, five hundred thirty-seven".