142232621 has 8 divisors (see below), whose sum is σ = 149174784. Its totient is φ = 135353680.

The previous prime is 142232611. The next prime is 142232633. The reversal of 142232621 is 126232241.

It is a happy number.

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-142232621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142232611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11165 + ... + 20226.

It is an arithmetic number, because the mean of its divisors is an integer number (18646848).

Almost surely, 2^142232621 is an apocalyptic number.

It is an amenable number.

142232621 is a deficient number, since it is larger than the sum of its proper divisors (6942163).

142232621 is a wasteful number, since it uses less digits than its factorization.

142232621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31611.

The product of its digits is 1152, while the sum is 23.

The square root of 142232621 is about 11926.1318540422. The cubic root of 142232621 is about 521.9950736704.

Adding to 142232621 its reverse (126232241), we get a palindrome (268464862).

It can be divided in two parts, 1422 and 32621, that added together give a palindrome (34043).

The spelling of 142232621 in words is "one hundred forty-two million, two hundred thirty-two thousand, six hundred twenty-one".