75957421 has 4 divisors (see below), whose sum is σ = 79955200. Its totient is φ = 71959644.

The previous prime is 75957419. The next prime is 75957437. The reversal of 75957421 is 12475957.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12475957 = 13 ⋅959689.

It is a cyclic number.

It is not a de Polignac number, because 75957421 - 2¹ = 75957419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75957451) 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, 1998861 + ... + 1998898.

It is an arithmetic number, because the mean of its divisors is an integer number (19988800).

Almost surely, 2^75957421 is an apocalyptic number.

It is an amenable number.

75957421 is a deficient number, since it is larger than the sum of its proper divisors (3997779).

75957421 is a wasteful number, since it uses less digits than its factorization.

75957421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997778.

The product of its digits is 88200, while the sum is 40.

The square root of 75957421 is about 8715.3554718095. The cubic root of 75957421 is about 423.5032396428.

The spelling of 75957421 in words is "seventy-five million, nine hundred fifty-seven thousand, four hundred twenty-one".