142236730 has 16 divisors (see below), whose sum is σ = 256955400. Its totient is φ = 56688192.

The previous prime is 142236719. The next prime is 142236737. The reversal of 142236730 is 37632241.

142236730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 56655729 + 85581001 = 7527^2 + 9251^2 .

It is a super-2 number, since 2×142236730² = 40462574722185800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142236737) 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, 22905 + ... + 28444.

Almost surely, 2^142236730 is an apocalyptic number.

142236730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142236730 is a deficient number, since it is larger than the sum of its proper divisors (114718670).

142236730 is a wasteful number, since it uses less digits than its factorization.

142236730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51633.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 142236730 is about 11926.3041215626. The cubic root of 142236730 is about 522.0001003117. Note that the first 3 decimals are identical.

Adding to 142236730 its reverse (37632241), we get a palindrome (179868971).

The spelling of 142236730 in words is "one hundred forty-two million, two hundred thirty-six thousand, seven hundred thirty".