75497421 has 4 divisors (see below), whose sum is σ = 100663232. Its totient is φ = 50331612.

The previous prime is 75497413. The next prime is 75497467. The reversal of 75497421 is 12479457.

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.

It is not a de Polignac number, because 75497421 - 2³ = 75497413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75497421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75497491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12582901 + ... + 12582906.

It is an arithmetic number, because the mean of its divisors is an integer number (25165808).

Almost surely, 2^75497421 is an apocalyptic number.

It is an amenable number.

75497421 is a deficient number, since it is larger than the sum of its proper divisors (25165811).

75497421 is a wasteful number, since it uses less digits than its factorization.

75497421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25165810.

The product of its digits is 70560, while the sum is 39.

The square root of 75497421 is about 8688.9251924504. The cubic root of 75497421 is about 422.6465926898.

The spelling of 75497421 in words is "seventy-five million, four hundred ninety-seven thousand, four hundred twenty-one".