142640227 has 8 divisors (see below), whose sum is σ = 149041440. Its totient is φ = 136255680.

The previous prime is 142640213. The next prime is 142640243. The reversal of 142640227 is 722046241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142640227 - 2¹¹ = 142638179 is a prime.

It is a super-2 number, since 2×142640227² = 40692468717223058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142640195 and 142640204.

It is not an unprimeable number, because it can be changed into a prime (142640257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15327 + ... + 22807.

It is an arithmetic number, because the mean of its divisors is an integer number (18630180).

Almost surely, 2^142640227 is an apocalyptic number.

142640227 is a deficient number, since it is larger than the sum of its proper divisors (6401213).

142640227 is an equidigital number, since it uses as much as digits as its factorization.

142640227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8333.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 142640227 is about 11943.2084047797. The cubic root of 142640227 is about 522.4932373994.

Adding to 142640227 its reverse (722046241), we get a palindrome (864686468).

The spelling of 142640227 in words is "one hundred forty-two million, six hundred forty thousand, two hundred twenty-seven".