142253530 has 16 divisors (see below), whose sum is σ = 262977480. Its totient is φ = 55363392.

The previous prime is 142253519. The next prime is 142253533. The reversal of 142253530 is 35352241.

It can be written as a sum of positive squares in 4 ways, for example, as 123943689 + 18309841 = 11133^2 + 4279^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142253495 and 142253504.

It is not an unprimeable number, because it can be changed into a prime (142253533) 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, 191865 + ... + 192604.

Almost surely, 2^142253530 is an apocalyptic number.

142253530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142253530 is a deficient number, since it is larger than the sum of its proper divisors (120723950).

142253530 is a wasteful number, since it uses less digits than its factorization.

142253530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384513.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 142253530 is about 11927.0084262568. The cubic root of 142253530 is about 522.0206511601.

The spelling of 142253530 in words is "one hundred forty-two million, two hundred fifty-three thousand, five hundred thirty".