120605551 has 8 divisors (see below), whose sum is σ = 131917824. Its totient is φ = 109351320.

The previous prime is 120605501. The next prime is 120605609. The reversal of 120605551 is 155506021.

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 120605551 - 2¹¹ = 120603503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120605501) 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, 10101 + ... + 18526.

It is an arithmetic number, because the mean of its divisors is an integer number (16489728).

Almost surely, 2^120605551 is an apocalyptic number.

120605551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120605551 is a deficient number, since it is larger than the sum of its proper divisors (11312273).

120605551 is a wasteful number, since it uses less digits than its factorization.

120605551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29021.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 120605551 is about 10982.0558639992. The cubic root of 120605551 is about 494.0706993941.

The spelling of 120605551 in words is "one hundred twenty million, six hundred five thousand, five hundred fifty-one".