120412561 has 2 divisors, whose sum is σ = 120412562. Its totient is φ = 120412560.

The previous prime is 120412559. The next prime is 120412571. The reversal of 120412561 is 165214021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118396161 + 2016400 = 10881^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 120412561 - 2¹ = 120412559 is a prime.

Together with 120412559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (120412571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60206280 + 60206281.

It is an arithmetic number, because the mean of its divisors is an integer number (60206281).

Almost surely, 2^120412561 is an apocalyptic number.

It is an amenable number.

120412561 is a deficient number, since it is larger than the sum of its proper divisors (1).

120412561 is an equidigital number, since it uses as much as digits as its factorization.

120412561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 120412561 is about 10973.2657399700. The cubic root of 120412561 is about 493.8070254918.

Adding to 120412561 its reverse (165214021), we get a palindrome (285626582).

The spelling of 120412561 in words is "one hundred twenty million, four hundred twelve thousand, five hundred sixty-one".