120142551 has 16 divisors (see below), whose sum is σ = 162807008. Its totient is φ = 78796800.

The previous prime is 120142549. The next prime is 120142601. The reversal of 120142551 is 155241021.

It is not a de Polignac number, because 120142551 - 2¹ = 120142549 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 (120142051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51531 + ... + 53811.

It is an arithmetic number, because the mean of its divisors is an integer number (10175438).

Almost surely, 2^120142551 is an apocalyptic number.

120142551 is a deficient number, since it is larger than the sum of its proper divisors (42664457).

120142551 is a wasteful number, since it uses less digits than its factorization.

120142551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 120142551 is about 10960.9557521231. The cubic root of 120142551 is about 493.4376492438.

Adding to 120142551 its reverse (155241021), we get a palindrome (275383572).

The spelling of 120142551 in words is "one hundred twenty million, one hundred forty-two thousand, five hundred fifty-one".