421173007 has 2 divisors, whose sum is σ = 421173008. Its totient is φ = 421173006.

The previous prime is 421173001. The next prime is 421173013. The reversal of 421173007 is 700371124.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (421173001) and next prime (421173013).

It is a cyclic number.

It is not a de Polignac number, because 421173007 - 2⁷ = 421172879 is a prime.

It is the 20523-rd Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421173001) by changing a digit.

It is a nontrivial repunit in base 20522.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210586503 + 210586504.

It is an arithmetic number, because the mean of its divisors is an integer number (210586504).

Almost surely, 2^421173007 is an apocalyptic number.

421173007 is a deficient number, since it is larger than the sum of its proper divisors (1).

421173007 is an equidigital number, since it uses as much as digits as its factorization.

421173007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 421173007 is about 20522.5000182726. The cubic root of 421173007 is about 749.5837731979.

It can be divided in two parts, 42 and 1173007, that multiplied together give a palindrome (49266294).

The spelling of 421173007 in words is "four hundred twenty-one million, one hundred seventy-three thousand, seven".