142646261 has 4 divisors (see below), whose sum is σ = 142802400. Its totient is φ = 142490124.

The previous prime is 142646233. The next prime is 142646279. The reversal of 142646261 is 162646241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142646261 - 2¹⁸ = 142384117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142640261) 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 3 ways as a sum of consecutive naturals, for example, 76691 + ... + 78528.

It is an arithmetic number, because the mean of its divisors is an integer number (35700600).

Almost surely, 2^142646261 is an apocalyptic number.

It is an amenable number.

142646261 is a deficient number, since it is larger than the sum of its proper divisors (156139).

142646261 is an equidigital number, since it uses as much as digits as its factorization.

142646261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156138.

The product of its digits is 13824, while the sum is 32.

The square root of 142646261 is about 11943.4610142956. The cubic root of 142646261 is about 522.5006048389.

The spelling of 142646261 in words is "one hundred forty-two million, six hundred forty-six thousand, two hundred sixty-one".