75400257 has 8 divisors (see below), whose sum is σ = 100574784. Its totient is φ = 50246288.

The previous prime is 75400249. The next prime is 75400309. The reversal of 75400257 is 75200457.

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

It is a cyclic number.

It is not a de Polignac number, because 75400257 - 2³ = 75400249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75400057) 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 7 ways as a sum of consecutive naturals, for example, 8908 + ... + 15170.

It is an arithmetic number, because the mean of its divisors is an integer number (12571848).

Almost surely, 2^75400257 is an apocalyptic number.

It is an amenable number.

75400257 is a deficient number, since it is larger than the sum of its proper divisors (25174527).

75400257 is a wasteful number, since it uses less digits than its factorization.

75400257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10279.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 75400257 is about 8683.3321369161. The cubic root of 75400257 is about 422.4652016670.

It can be divided in two parts, 75400 and 257, that added together give a palindrome (75657).

The spelling of 75400257 in words is "seventy-five million, four hundred thousand, two hundred fifty-seven".