120573781 has 4 divisors (see below), whose sum is σ = 122848812. Its totient is φ = 118298752.

The previous prime is 120573773. The next prime is 120573799. The reversal of 120573781 is 187375021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42693156 + 77880625 = 6534^2 + 8825^2 .

It is a cyclic number.

It is not a de Polignac number, because 120573781 - 2³ = 120573773 is a prime.

It is a super-2 number, since 2×120573781² = 29076073329271922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120573721) 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, 1137436 + ... + 1137541.

It is an arithmetic number, because the mean of its divisors is an integer number (30712203).

Almost surely, 2^120573781 is an apocalyptic number.

It is an amenable number.

120573781 is a deficient number, since it is larger than the sum of its proper divisors (2275031).

120573781 is an equidigital number, since it uses as much as digits as its factorization.

120573781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275030.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 120573781 is about 10980.6093182482. The cubic root of 120573781 is about 494.0273127659.

The spelling of 120573781 in words is "one hundred twenty million, five hundred seventy-three thousand, seven hundred eighty-one".