120705421 has 2 divisors, whose sum is σ = 120705422. Its totient is φ = 120705420.

The previous prime is 120705407. The next prime is 120705437. The reversal of 120705421 is 124507021.

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., 120692196 + 13225 = 10986^2 + 115^2 .

It is an emirp because it is prime and its reverse (124507021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120705421 - 2¹⁵ = 120672653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120705392 and 120705401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120705451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60352710 + 60352711.

It is an arithmetic number, because the mean of its divisors is an integer number (60352711).

Almost surely, 2^120705421 is an apocalyptic number.

It is an amenable number.

120705421 is a deficient number, since it is larger than the sum of its proper divisors (1).

120705421 is an equidigital number, since it uses as much as digits as its factorization.

120705421 is an evil number, because the sum of its binary digits is even.

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

The square root of 120705421 is about 10986.6018859336. The cubic root of 120705421 is about 494.2070370303.

The spelling of 120705421 in words is "one hundred twenty million, seven hundred five thousand, four hundred twenty-one".