120421507 has 2 divisors, whose sum is σ = 120421508. Its totient is φ = 120421506.

The previous prime is 120421439. The next prime is 120421519. The reversal of 120421507 is 705124021.

It is a happy number.

120421507 is nontrivially palindromic in base 6.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120421507 is a prime.

It is not a weakly prime, because it can be changed into another prime (120421547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60210753 + 60210754.

It is an arithmetic number, because the mean of its divisors is an integer number (60210754).

Almost surely, 2^120421507 is an apocalyptic number.

120421507 is a deficient number, since it is larger than the sum of its proper divisors (1).

120421507 is an equidigital number, since it uses as much as digits as its factorization.

120421507 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 120421507 is about 10973.6733594544. The cubic root of 120421507 is about 493.8192542499.

Adding to 120421507 its reverse (705124021), we get a palindrome (825545528).

The spelling of 120421507 in words is "one hundred twenty million, four hundred twenty-one thousand, five hundred seven".