142120146 has 32 divisors (see below), whose sum is σ = 325859328. Its totient is φ = 40479120.

The previous prime is 142120141. The next prime is 142120169. The reversal of 142120146 is 641021241.

It is a happy number.

It is a super-2 number, since 2×142120146² = 40396271798122632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142120141) 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, 8791 + ... + 19013.

It is an arithmetic number, because the mean of its divisors is an integer number (10183104).

Almost surely, 2^142120146 is an apocalyptic number.

142120146 is an abundant number, since it is smaller than the sum of its proper divisors (183739182).

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

142120146 is a wasteful number, since it uses less digits than its factorization.

142120146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10566.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 142120146 is about 11921.4154360965. The cubic root of 142120146 is about 521.8574426115.

Adding to 142120146 its reverse (641021241), we get a palindrome (783141387).

The spelling of 142120146 in words is "one hundred forty-two million, one hundred twenty thousand, one hundred forty-six".