120551405 has 32 divisors (see below), whose sum is σ = 166440960. Its totient is φ = 83139840.

The previous prime is 120551401. The next prime is 120551411. The reversal of 120551405 is 504155021.

It is a happy number.

It is not a de Polignac number, because 120551405 - 2² = 120551401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120551401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57404 + ... + 59466.

It is an arithmetic number, because the mean of its divisors is an integer number (5201280).

Almost surely, 2^120551405 is an apocalyptic number.

It is an amenable number.

120551405 is a deficient number, since it is larger than the sum of its proper divisors (45889555).

120551405 is a wasteful number, since it uses less digits than its factorization.

120551405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 120551405 is about 10979.5903839806. The cubic root of 120551405 is about 493.9967504581.

The spelling of 120551405 in words is "one hundred twenty million, five hundred fifty-one thousand, four hundred five".