75457421 has 8 divisors (see below), whose sum is σ = 81338880. Its totient is φ = 69586992.

The previous prime is 75457409. The next prime is 75457423. The reversal of 75457421 is 12475457.

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 75457421 - 2²² = 71263117 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 (75457423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16460 + ... + 20538.

It is an arithmetic number, because the mean of its divisors is an integer number (10167360).

Almost surely, 2^75457421 is an apocalyptic number.

It is an amenable number.

75457421 is a deficient number, since it is larger than the sum of its proper divisors (5881459).

75457421 is a wasteful number, since it uses less digits than its factorization.

75457421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5515.

The product of its digits is 39200, while the sum is 35.

The square root of 75457421 is about 8686.6231068235. The cubic root of 75457421 is about 422.5719373791.

The spelling of 75457421 in words is "seventy-five million, four hundred fifty-seven thousand, four hundred twenty-one".