61075257 has 16 divisors (see below), whose sum is σ = 83411520. Its totient is φ = 39739392.

The previous prime is 61075243. The next prime is 61075277. The reversal of 61075257 is 75257016.

It is not a de Polignac number, because 61075257 - 2⁴ = 61075241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61075277) 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, 21369 + ... + 24057.

It is an arithmetic number, because the mean of its divisors is an integer number (5213220).

Almost surely, 2^61075257 is an apocalyptic number.

61075257 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

61075257 is a deficient number, since it is larger than the sum of its proper divisors (22336263).

61075257 is a wasteful number, since it uses less digits than its factorization.

61075257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 61075257 is about 7815.0660265925. The cubic root of 61075257 is about 393.8115364645.

The spelling of 61075257 in words is "sixty-one million, seventy-five thousand, two hundred fifty-seven".