60172421 has 2 divisors, whose sum is σ = 60172422. Its totient is φ = 60172420.

The previous prime is 60172417. The next prime is 60172423. The reversal of 60172421 is 12427106.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55502500 + 4669921 = 7450^2 + 2161^2 .

It is a cyclic number.

It is not a de Polignac number, because 60172421 - 2² = 60172417 is a prime.

It is a Sophie Germain prime.

Together with 60172423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60172423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30086210 + 30086211.

It is an arithmetic number, because the mean of its divisors is an integer number (30086211).

Almost surely, 2^60172421 is an apocalyptic number.

It is an amenable number.

60172421 is a deficient number, since it is larger than the sum of its proper divisors (1).

60172421 is an equidigital number, since it uses as much as digits as its factorization.

60172421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 60172421 is about 7757.0884357470. The cubic root of 60172421 is about 391.8614084724.

Adding to 60172421 its reverse (12427106), we get a palindrome (72599527).

The spelling of 60172421 in words is "sixty million, one hundred seventy-two thousand, four hundred twenty-one".