142149226 has 4 divisors (see below), whose sum is σ = 213223842. Its totient is φ = 71074612.

The previous prime is 142149211. The next prime is 142149239. The reversal of 142149226 is 622941241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622941241 = 13 ⋅47918557.

It can be written as a sum of positive squares in only one way, i.e., 140446201 + 1703025 = 11851^2 + 1305^2 .

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35537305 + ... + 35537308.

Almost surely, 2^142149226 is an apocalyptic number.

142149226 is a deficient number, since it is larger than the sum of its proper divisors (71074616).

142149226 is an equidigital number, since it uses as much as digits as its factorization.

142149226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71074615.

The product of its digits is 6912, while the sum is 31.

The square root of 142149226 is about 11922.6350275432. The cubic root of 142149226 is about 521.8930335767.

The spelling of 142149226 in words is "one hundred forty-two million, one hundred forty-nine thousand, two hundred twenty-six".