142306505 has 16 divisors (see below), whose sum is σ = 186608448. Its totient is φ = 103320000.

The previous prime is 142306501. The next prime is 142306517. The reversal of 142306505 is 505603241.

It is not a de Polignac number, because 142306505 - 2² = 142306501 is a prime.

It is a super-2 number, since 2×142306505² = 40502282730630050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142306501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36710 + ... + 40400.

It is an arithmetic number, because the mean of its divisors is an integer number (11663028).

Almost surely, 2^142306505 is an apocalyptic number.

It is an amenable number.

142306505 is a deficient number, since it is larger than the sum of its proper divisors (44301943).

142306505 is a wasteful number, since it uses less digits than its factorization.

142306505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 142306505 is about 11929.2290195134. The cubic root of 142306505 is about 522.0854430190.

Adding to 142306505 its reverse (505603241), we get a palindrome (647909746).

The spelling of 142306505 in words is "one hundred forty-two million, three hundred six thousand, five hundred five".