142721246 has 8 divisors (see below), whose sum is σ = 219303504. Its totient is φ = 69620080.

The previous prime is 142721237. The next prime is 142721251. The reversal of 142721246 is 642127241.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 870170 + ... + 870333.

It is an arithmetic number, because the mean of its divisors is an integer number (27412938).

Almost surely, 2^142721246 is an apocalyptic number.

142721246 is a deficient number, since it is larger than the sum of its proper divisors (76582258).

142721246 is a wasteful number, since it uses less digits than its factorization.

142721246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740546.

The product of its digits is 5376, while the sum is 29.

The square root of 142721246 is about 11946.5997672978. The cubic root of 142721246 is about 522.5921432697.

Adding to 142721246 its reverse (642127241), we get a palindrome (784848487).

The spelling of 142721246 in words is "one hundred forty-two million, seven hundred twenty-one thousand, two hundred forty-six".