142221015 has 40 divisors (see below), whose sum is σ = 255848208. Its totient is φ = 75582720.

The previous prime is 142220999. The next prime is 142221019. The reversal of 142221015 is 510122241.

It is not a de Polignac number, because 142221015 - 2⁴ = 142220999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142221019) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 174960 + ... + 175770.

Almost surely, 2^142221015 is an apocalyptic number.

142221015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

142221015 is a deficient number, since it is larger than the sum of its proper divisors (113627193).

142221015 is an equidigital number, since it uses as much as digits as its factorization.

142221015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261 (or 1252 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 142221015 is about 11925.6452655611. The cubic root of 142221015 is about 521.9808752407.

Adding to 142221015 its reverse (510122241), we get a palindrome (652343256).

The spelling of 142221015 in words is "one hundred forty-two million, two hundred twenty-one thousand, fifteen".