142748661 has 12 divisors (see below), whose sum is σ = 209207936. Its totient is φ = 86514120.

The previous prime is 142748647. The next prime is 142748693. The reversal of 142748661 is 166847241.

It is not a de Polignac number, because 142748661 - 2⁶ = 142748597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142748621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196261 + ... + 196986.

Almost surely, 2^142748661 is an apocalyptic number.

142748661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142748661 is a deficient number, since it is larger than the sum of its proper divisors (66459275).

142748661 is a wasteful number, since it uses less digits than its factorization.

142748661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393272 (or 393261 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 142748661 is about 11947.7471098111. The cubic root of 142748661 is about 522.6256023067.

The spelling of 142748661 in words is "one hundred forty-two million, seven hundred forty-eight thousand, six hundred sixty-one".