120257691 has 4 divisors (see below), whose sum is σ = 160343592. Its totient is φ = 80171792.

The previous prime is 120257681. The next prime is 120257699. The reversal of 120257691 is 196752021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196752021 = 3 ⋅65584007.

It is a cyclic number.

It is not a de Polignac number, because 120257691 - 2¹⁴ = 120241307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120257699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20042946 + ... + 20042951.

It is an arithmetic number, because the mean of its divisors is an integer number (40085898).

Almost surely, 2^120257691 is an apocalyptic number.

120257691 is a deficient number, since it is larger than the sum of its proper divisors (40085901).

120257691 is an equidigital number, since it uses as much as digits as its factorization.

120257691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40085900.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 120257691 is about 10966.2067735384. The cubic root of 120257691 is about 493.5952294698.

The spelling of 120257691 in words is "one hundred twenty million, two hundred fifty-seven thousand, six hundred ninety-one".