120143661 has 8 divisors (see below), whose sum is σ = 174754464. Its totient is φ = 72814320.

The previous prime is 120143659. The next prime is 120143701. The reversal of 120143661 is 166341021.

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

It is not a de Polignac number, because 120143661 - 2¹ = 120143659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120143761) 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, 1820326 + ... + 1820391.

It is an arithmetic number, because the mean of its divisors is an integer number (21844308).

Almost surely, 2^120143661 is an apocalyptic number.

120143661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120143661 is a deficient number, since it is larger than the sum of its proper divisors (54610803).

120143661 is a wasteful number, since it uses less digits than its factorization.

120143661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640731.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 120143661 is about 10961.0063862768. The cubic root of 120143661 is about 493.4391688667.

Adding to 120143661 its reverse (166341021), we get a palindrome (286484682).

The spelling of 120143661 in words is "one hundred twenty million, one hundred forty-three thousand, six hundred sixty-one".