120420997 has 4 divisors (see below), whose sum is σ = 121093920. Its totient is φ = 119748076.

The previous prime is 120420991. The next prime is 120421001. The reversal of 120420997 is 799024021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120420997 - 2¹⁹ = 119896709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120420991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336193 + ... + 336550.

It is an arithmetic number, because the mean of its divisors is an integer number (30273480).

Almost surely, 2^120420997 is an apocalyptic number.

It is an amenable number.

120420997 is a deficient number, since it is larger than the sum of its proper divisors (672923).

120420997 is an equidigital number, since it uses as much as digits as its factorization.

120420997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672922.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 120420997 is about 10973.6501219968. The cubic root of 120420997 is about 493.8185571204.

It can be divided in two parts, 1204 and 20997, that added together give a square (22201 = 149²).

The spelling of 120420997 in words is "one hundred twenty million, four hundred twenty thousand, nine hundred ninety-seven".