142181002 has 4 divisors (see below), whose sum is σ = 213271506. Its totient is φ = 71090500.

The previous prime is 142180999. The next prime is 142181003. The reversal of 142181002 is 200181241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 76230361 + 65950641 = 8731^2 + 8121^2 .

It is not an unprimeable number, because it can be changed into a prime (142181003) 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 as a sum of consecutive naturals, namely, 35545249 + ... + 35545252.

Almost surely, 2^142181002 is an apocalyptic number.

142181002 is a deficient number, since it is larger than the sum of its proper divisors (71090504).

142181002 is an equidigital number, since it uses as much as digits as its factorization.

142181002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71090503.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 142181002 is about 11923.9675444040. The cubic root of 142181002 is about 521.9319186225.

The spelling of 142181002 in words is "one hundred forty-two million, one hundred eighty-one thousand, two".