142643722 has 16 divisors (see below), whose sum is σ = 232543080. Its totient is φ = 65230272.

The previous prime is 142643693. The next prime is 142643729. The reversal of 142643722 is 227346241.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 127441521 + 15202201 = 11289^2 + 3899^2 .

It is not an unprimeable number, because it can be changed into a prime (142643729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22333 + ... + 28000.

Almost surely, 2^142643722 is an apocalyptic number.

142643722 is a deficient number, since it is larger than the sum of its proper divisors (89899358).

142643722 is a wasteful number, since it uses less digits than its factorization.

142643722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50457.

The product of its digits is 16128, while the sum is 31.

The square root of 142643722 is about 11943.3547213503. The cubic root of 142643722 is about 522.4975047766.

Adding to 142643722 its reverse (227346241), we get a palindrome (369989963).

The spelling of 142643722 in words is "one hundred forty-two million, six hundred forty-three thousand, seven hundred twenty-two".