142856738 has 4 divisors (see below), whose sum is σ = 214285110. Its totient is φ = 71428368.

The previous prime is 142856737. The next prime is 142856743. The reversal of 142856738 is 837658241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 837658241 = 7 ⋅119665463.

It can be written as a sum of positive squares in only one way, i.e., 101344489 + 41512249 = 10067^2 + 6443^2 .

It is not an unprimeable number, because it can be changed into a prime (142856737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35714183 + ... + 35714186.

Almost surely, 2^142856738 is an apocalyptic number.

142856738 is a deficient number, since it is larger than the sum of its proper divisors (71428372).

142856738 is an equidigital number, since it uses as much as digits as its factorization.

142856738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71428371.

The product of its digits is 322560, while the sum is 44.

The square root of 142856738 is about 11952.2691569425. The cubic root of 142856738 is about 522.7574647422.

The spelling of 142856738 in words is "one hundred forty-two million, eight hundred fifty-six thousand, seven hundred thirty-eight".