75047421 has 8 divisors (see below), whose sum is σ = 100119040. Its totient is φ = 50003712.

The previous prime is 75047419. The next prime is 75047429. The reversal of 75047421 is 12474057.

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

It is not a de Polignac number, because 75047421 - 2¹ = 75047419 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75047429) 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, 420 + ... + 12258.

It is an arithmetic number, because the mean of its divisors is an integer number (12514880).

Almost surely, 2^75047421 is an apocalyptic number.

It is an amenable number.

75047421 is a deficient number, since it is larger than the sum of its proper divisors (25071619).

75047421 is a wasteful number, since it uses less digits than its factorization.

75047421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13955.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 75047421 is about 8662.9914579203. The cubic root of 75047421 is about 421.8051948592.

The spelling of 75047421 in words is "seventy-five million, forty-seven thousand, four hundred twenty-one".