142220294 has 4 divisors (see below), whose sum is σ = 213330444. Its totient is φ = 71110146.

The previous prime is 142220231. The next prime is 142220311. The reversal of 142220294 is 492022241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 492022241 = 263 ⋅1870807.

It is a super-2 number, since 2×142220294² = 40453224050892872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35555072 + ... + 35555075.

It is an arithmetic number, because the mean of its divisors is an integer number (53332611).

Almost surely, 2^142220294 is an apocalyptic number.

142220294 is a deficient number, since it is larger than the sum of its proper divisors (71110150).

142220294 is an equidigital number, since it uses as much as digits as its factorization.

142220294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71110149.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 142220294 is about 11925.6150365505. The cubic root of 142220294 is about 521.9799931656.

The spelling of 142220294 in words is "one hundred forty-two million, two hundred twenty thousand, two hundred ninety-four".