172421413 has 2 divisors, whose sum is σ = 172421414. Its totient is φ = 172421412.

The previous prime is 172421407. The next prime is 172421479. The reversal of 172421413 is 314124271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125059489 + 47361924 = 11183^2 + 6882^2 .

It is a cyclic number.

It is not a de Polignac number, because 172421413 - 2¹⁷ = 172290341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172425413) 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, 86210706 + 86210707.

It is an arithmetic number, because the mean of its divisors is an integer number (86210707).

Almost surely, 2^172421413 is an apocalyptic number.

It is an amenable number.

172421413 is a deficient number, since it is larger than the sum of its proper divisors (1).

172421413 is an equidigital number, since it uses as much as digits as its factorization.

172421413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 172421413 is about 13130.9334397826. The cubic root of 172421413 is about 556.5835928876.

Adding to 172421413 its reverse (314124271), we get a palindrome (486545684).

The spelling of 172421413 in words is "one hundred seventy-two million, four hundred twenty-one thousand, four hundred thirteen".