142147621 has 8 divisors (see below), whose sum is σ = 177223104. Its totient is φ = 110764320.

The previous prime is 142147601. The next prime is 142147631. The reversal of 142147621 is 126741241.

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

It is a cyclic number.

It is not a de Polignac number, because 142147621 - 2¹³ = 142139429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142147621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142147601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 922960 + ... + 923113.

It is an arithmetic number, because the mean of its divisors is an integer number (22152888).

Almost surely, 2^142147621 is an apocalyptic number.

142147621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142147621 is a deficient number, since it is larger than the sum of its proper divisors (35075483).

142147621 is a wasteful number, since it uses less digits than its factorization.

142147621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846091.

The product of its digits is 2688, while the sum is 28.

The square root of 142147621 is about 11922.5677184070. The cubic root of 142147621 is about 521.8910693464.

Adding to 142147621 its reverse (126741241), we get a palindrome (268888862).

The spelling of 142147621 in words is "one hundred forty-two million, one hundred forty-seven thousand, six hundred twenty-one".