75355421 has 8 divisors (see below), whose sum is σ = 77804544. Its totient is φ = 72928080.

The previous prime is 75355411. The next prime is 75355439. The reversal of 75355421 is 12455357.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75355421 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 (75355411) 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, 1736 + ... + 12398.

It is an arithmetic number, because the mean of its divisors is an integer number (9725568).

Almost surely, 2^75355421 is an apocalyptic number.

It is an amenable number.

75355421 is a deficient number, since it is larger than the sum of its proper divisors (2449123).

75355421 is a wasteful number, since it uses less digits than its factorization.

75355421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10891.

The product of its digits is 21000, while the sum is 32.

The square root of 75355421 is about 8680.7500251994. The cubic root of 75355421 is about 422.3814468441.

The spelling of 75355421 in words is "seventy-five million, three hundred fifty-five thousand, four hundred twenty-one".