142221540406 has 32 divisors (see below), whose sum is σ = 241824577536. Its totient is φ = 62146440000.

The previous prime is 142221540361. The next prime is 142221540431. The reversal of 142221540406 is 604045122241.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 587535 + ... + 793498.

It is an arithmetic number, because the mean of its divisors is an integer number (7557018048).

Almost surely, 2^142221540406 is an apocalyptic number.

142221540406 is a deficient number, since it is larger than the sum of its proper divisors (99603037130).

142221540406 is a wasteful number, since it uses less digits than its factorization.

142221540406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381228.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 142221540406 its reverse (604045122241), we get a palindrome (746266662647).

The spelling of 142221540406 in words is "one hundred forty-two billion, two hundred twenty-one million, five hundred forty thousand, four hundred six".