142421356 has 72 divisors (see below), whose sum is σ = 316510208. Its totient is φ = 54885600.

The previous prime is 142421351. The next prime is 142421369. The reversal of 142421356 is 653124241.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (142421351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 430111 + ... + 430441.

Almost surely, 2^142421356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142421356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158255104).

142421356 is an abundant number, since it is smaller than the sum of its proper divisors (174088852).

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

142421356 is a wasteful number, since it uses less digits than its factorization.

142421356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 478 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 142421356 is about 11934.0418970272. The cubic root of 142421356 is about 522.2258580368.

Adding to 142421356 its reverse (653124241), we get a palindrome (795545597).

The spelling of 142421356 in words is "one hundred forty-two million, four hundred twenty-one thousand, three hundred fifty-six".