120000051 has 6 divisors (see below), whose sum is σ = 173333420. Its totient is φ = 80000028.

The previous prime is 120000043. The next prime is 120000053. The reversal of 120000051 is 150000021.

It is a happy number.

It is not a de Polignac number, because 120000051 - 2³ = 120000043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 13333339 = 120000051 / (1 + 2 + 0 + 0 + 0 + 0 + 0 + 5 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 119999988 and 120000042.

It is not an unprimeable number, because it can be changed into a prime (120000053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6666661 + ... + 6666678.

Almost surely, 2^120000051 is an apocalyptic number.

120000051 is a deficient number, since it is larger than the sum of its proper divisors (53333369).

120000051 is a wasteful number, since it uses less digits than its factorization.

120000051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13333345 (or 13333342 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 120000051 is about 10954.4534779239. The cubic root of 120000051 is about 493.2424847421.

Adding to 120000051 its reverse (150000021), we get a palindrome (270000072).

The spelling of 120000051 in words is "one hundred twenty million, fifty-one", and thus it is an aban number.