120551681 has 8 divisors (see below), whose sum is σ = 123467328. Its totient is φ = 117670000.

The previous prime is 120551659. The next prime is 120551687. The reversal of 120551681 is 186155021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120551681 - 2²⁶ = 53442817 is a prime.

It is a super-2 number, since 2×120551681² = 29065415583851522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120551687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1235 + ... + 15576.

It is an arithmetic number, because the mean of its divisors is an integer number (15433416).

Almost surely, 2^120551681 is an apocalyptic number.

It is an amenable number.

120551681 is a deficient number, since it is larger than the sum of its proper divisors (2915647).

120551681 is a wasteful number, since it uses less digits than its factorization.

120551681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16983.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 120551681 is about 10979.6029527483. The cubic root of 120551681 is about 493.9971274563.

The spelling of 120551681 in words is "one hundred twenty million, five hundred fifty-one thousand, six hundred eighty-one".