715402021 has 2 divisors, whose sum is σ = 715402022. Its totient is φ = 715402020.

The previous prime is 715402013. The next prime is 715402031. The reversal of 715402021 is 120204517.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667653921 + 47748100 = 25839^2 + 6910^2 .

It is an emirp because it is prime and its reverse (120204517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 715402021 - 2³ = 715402013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 715401983 and 715402001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (715402001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357701010 + 357701011.

It is an arithmetic number, because the mean of its divisors is an integer number (357701011).

Almost surely, 2^715402021 is an apocalyptic number.

It is an amenable number.

715402021 is a deficient number, since it is larger than the sum of its proper divisors (1).

715402021 is an equidigital number, since it uses as much as digits as its factorization.

715402021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 715402021 is about 26747.0002243242. Note that the first 3 decimals coincide. The cubic root of 715402021 is about 894.3689656263.

Adding to 715402021 its reverse (120204517), we get a palindrome (835606538).

The spelling of 715402021 in words is "seven hundred fifteen million, four hundred two thousand, twenty-one".