142236649 has 12 divisors (see below), whose sum is σ = 147774288. Its totient is φ = 136899720.

The previous prime is 142236613. The next prime is 142236697. The reversal of 142236649 is 946632241.

It is a happy number.

It is a Cunningham number, because it is equal to 522³+1.

It is not a de Polignac number, because 142236649 - 2⁹ = 142236137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142236049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271702 + ... + 272224.

It is an arithmetic number, because the mean of its divisors is an integer number (12314524).

Almost surely, 2^142236649 is an apocalyptic number.

It is an amenable number.

142236649 is a deficient number, since it is larger than the sum of its proper divisors (5537639).

142236649 is an equidigital number, since it uses as much as digits as its factorization.

142236649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 837 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 142236649 is about 11926.3007257070. The cubic root of 142236649 is about 522.0000012233. Note that the first 5 decimals are identical.

The spelling of 142236649 in words is "one hundred forty-two million, two hundred thirty-six thousand, six hundred forty-nine".