142011251 has 8 divisors (see below), whose sum is σ = 150731280. Its totient is φ = 133331968.

The previous prime is 142011227. The next prime is 142011253. The reversal of 142011251 is 152110241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142011251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142011253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2846 + ... + 17091.

It is an arithmetic number, because the mean of its divisors is an integer number (18841410).

Almost surely, 2^142011251 is an apocalyptic number.

142011251 is a deficient number, since it is larger than the sum of its proper divisors (8720029).

142011251 is a wasteful number, since it uses less digits than its factorization.

142011251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20373.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 142011251 is about 11916.8473599354. The cubic root of 142011251 is about 521.7241230503.

Adding to 142011251 its reverse (152110241), we get a palindrome (294121492).

The spelling of 142011251 in words is "one hundred forty-two million, eleven thousand, two hundred fifty-one".