142721046 has 96 divisors (see below), whose sum is σ = 358525440. Its totient is φ = 40658112.

The previous prime is 142721011. The next prime is 142721057. The reversal of 142721046 is 640127241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 208621 + ... + 209303.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^142721046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142721046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179262720).

142721046 is an abundant number, since it is smaller than the sum of its proper divisors (215804394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142721046 is a wasteful number, since it uses less digits than its factorization.

142721046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 142721046 is about 11946.5913967123. The cubic root of 142721046 is about 522.5918991610.

Adding to 142721046 its reverse (640127241), we get a palindrome (782848287).

The spelling of 142721046 in words is "one hundred forty-two million, seven hundred twenty-one thousand, forty-six".