142002306 has 12 divisors (see below), whose sum is σ = 307671702. Its totient is φ = 47334096.

The previous prime is 142002251. The next prime is 142002307. The reversal of 142002306 is 603200241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 133056225 + 8946081 = 11535^2 + 2991^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 7889017 = 142002306 / (1 + 4 + 2 + 0 + 0 + 2 + 3 + 0 + 6).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142002307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3944491 + ... + 3944526.

Almost surely, 2^142002306 is an apocalyptic number.

142002306 is an abundant number, since it is smaller than the sum of its proper divisors (165669396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142002306 is a wasteful number, since it uses less digits than its factorization.

142002306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7889025 (or 7889022 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 142002306 is about 11916.4720450308. The cubic root of 142002306 is about 521.7131687064.

Adding to 142002306 its reverse (603200241), we get a palindrome (745202547).

The spelling of 142002306 in words is "one hundred forty-two million, two thousand, three hundred six".