750424021 has 2 divisors, whose sum is σ = 750424022. Its totient is φ = 750424020.

The previous prime is 750424007. The next prime is 750424049. The reversal of 750424021 is 120424057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 596043396 + 154380625 = 24414^2 + 12425^2 .

It is a cyclic number.

It is not a de Polignac number, because 750424021 - 2¹³ = 750415829 is a prime.

It is a super-2 number, since 2×750424021² = 1126272422587616882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (750424001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 375212010 + 375212011.

It is an arithmetic number, because the mean of its divisors is an integer number (375212011).

Almost surely, 2^750424021 is an apocalyptic number.

It is an amenable number.

750424021 is a deficient number, since it is larger than the sum of its proper divisors (1).

750424021 is an equidigital number, since it uses as much as digits as its factorization.

750424021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 750424021 is about 27393.8683102624. The cubic root of 750424021 is about 908.7314857790.

Adding to 750424021 its reverse (120424057), we get a palindrome (870848078).

The spelling of 750424021 in words is "seven hundred fifty million, four hundred twenty-four thousand, twenty-one".