142120894 has 4 divisors (see below), whose sum is σ = 213181344. Its totient is φ = 71060446.

The previous prime is 142120871. The next prime is 142120907. The reversal of 142120894 is 498021241.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×142120894² = 40396697022718472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35530222 + ... + 35530225.

It is an arithmetic number, because the mean of its divisors is an integer number (53295336).

Almost surely, 2^142120894 is an apocalyptic number.

142120894 is a deficient number, since it is larger than the sum of its proper divisors (71060450).

142120894 is an equidigital number, since it uses as much as digits as its factorization.

142120894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71060449.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 142120894 is about 11921.4468081689. The cubic root of 142120894 is about 521.8583581484.

The spelling of 142120894 in words is "one hundred forty-two million, one hundred twenty thousand, eight hundred ninety-four".