142247450 has 24 divisors (see below), whose sum is σ = 271037340. Its totient is φ = 55510400.

The previous prime is 142247447. The next prime is 142247467. The reversal of 142247450 is 54742241.

It can be written as a sum of positive squares in 6 ways, for example, as 25110121 + 117137329 = 5011^2 + 10823^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32645 + ... + 36744.

Almost surely, 2^142247450 is an apocalyptic number.

142247450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142247450 is a deficient number, since it is larger than the sum of its proper divisors (128789890).

142247450 is a wasteful number, since it uses less digits than its factorization.

142247450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69442 (or 69437 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 142247450 is about 11926.7535398364. The cubic root of 142247450 is about 522.0132138970.

Adding to 142247450 its reverse (54742241), we get a palindrome (196989691).

The spelling of 142247450 in words is "one hundred forty-two million, two hundred forty-seven thousand, four hundred fifty".