142120064 has 16 divisors (see below), whose sum is σ = 283130070. Its totient is φ = 71059968.

The previous prime is 142120049. The next prime is 142120067. The reversal of 142120064 is 460021241.

It can be written as a sum of positive squares in only one way, i.e., 110670400 + 31449664 = 10520^2 + 5608^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×142120064² = 40396225182728192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142120067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555029 + ... + 555284.

Almost surely, 2^142120064 is an apocalyptic number.

It is an amenable number.

142120064 is a deficient number, since it is larger than the sum of its proper divisors (141010006).

142120064 is an equidigital number, since it uses as much as digits as its factorization.

142120064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110327 (or 1110315 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 142120064 is about 11921.4119969071. The cubic root of 142120064 is about 521.8573422450.

The spelling of 142120064 in words is "one hundred forty-two million, one hundred twenty thousand, sixty-four".