75142657 has 4 divisors (see below), whose sum is σ = 75212500. Its totient is φ = 75072816.

The previous prime is 75142651. The next prime is 75142673. The reversal of 75142657 is 75624157.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75624157 = 7 ⋅10803451.

It can be written as a sum of positive squares in 2 ways, for example, as 43771456 + 31371201 = 6616^2 + 5601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75142657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75142651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33282 + ... + 35467.

It is an arithmetic number, because the mean of its divisors is an integer number (18803125).

Almost surely, 2^75142657 is an apocalyptic number.

It is an amenable number.

75142657 is a deficient number, since it is larger than the sum of its proper divisors (69843).

75142657 is a wasteful number, since it uses less digits than its factorization.

75142657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69842.

The product of its digits is 58800, while the sum is 37.

The square root of 75142657 is about 8668.4864307444. The cubic root of 75142657 is about 421.9835445767.

The spelling of 75142657 in words is "seventy-five million, one hundred forty-two thousand, six hundred fifty-seven".