75019421 has 2 divisors, whose sum is σ = 75019422. Its totient is φ = 75019420.

The previous prime is 75019403. The next prime is 75019489. The reversal of 75019421 is 12491057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37687321 + 37332100 = 6139^2 + 6110^2 .

It is a cyclic number.

It is not a de Polignac number, because 75019421 - 2¹⁴ = 75003037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75019921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37509710 + 37509711.

It is an arithmetic number, because the mean of its divisors is an integer number (37509711).

Almost surely, 2^75019421 is an apocalyptic number.

It is an amenable number.

75019421 is a deficient number, since it is larger than the sum of its proper divisors (1).

75019421 is an equidigital number, since it uses as much as digits as its factorization.

75019421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 75019421 is about 8661.3752372242. The cubic root of 75019421 is about 421.7527301889.

The spelling of 75019421 in words is "seventy-five million, nineteen thousand, four hundred twenty-one".