120861381 has 8 divisors (see below), whose sum is σ = 170627904. Its totient is φ = 75834560.

The previous prime is 120861373. The next prime is 120861401. The reversal of 120861381 is 183168021.

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 120861381 - 2³ = 120861373 is a prime.

It is a super-2 number, since 2×120861381² = 29214946834454322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120861311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184865 + ... + 1184966.

It is an arithmetic number, because the mean of its divisors is an integer number (21328488).

Almost surely, 2^120861381 is an apocalyptic number.

It is an amenable number.

120861381 is a deficient number, since it is larger than the sum of its proper divisors (49766523).

120861381 is a wasteful number, since it uses less digits than its factorization.

120861381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369851.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 120861381 is about 10993.6973307436. The cubic root of 120861381 is about 494.4197956525.

The spelling of 120861381 in words is "one hundred twenty million, eight hundred sixty-one thousand, three hundred eighty-one".