120142540 has 24 divisors (see below), whose sum is σ = 288342432. Its totient is φ = 41191680.

The previous prime is 120142537. The next prime is 120142549. The reversal of 120142540 is 45241021.

It is not an unprimeable number, because it can be changed into a prime (120142549) 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, 428941 + ... + 429220.

It is an arithmetic number, because the mean of its divisors is an integer number (12014268).

Almost surely, 2^120142540 is an apocalyptic number.

120142540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120142540 is an abundant number, since it is smaller than the sum of its proper divisors (168199892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120142540 is a wasteful number, since it uses less digits than its factorization.

120142540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858177 (or 858175 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 120142540 is about 10960.9552503420. The cubic root of 120142540 is about 493.4376341844.

Adding to 120142540 its reverse (45241021), we get a palindrome (165383561).

The spelling of 120142540 in words is "one hundred twenty million, one hundred forty-two thousand, five hundred forty".