142561673 has 4 divisors (see below), whose sum is σ = 142644480. Its totient is φ = 142478868.

The previous prime is 142561649. The next prime is 142561687. The reversal of 142561673 is 376165241.

142561673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 142561673 - 2¹² = 142557577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142561603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38765 + ... + 42282.

It is an arithmetic number, because the mean of its divisors is an integer number (35661120).

Almost surely, 2^142561673 is an apocalyptic number.

It is an amenable number.

142561673 is a deficient number, since it is larger than the sum of its proper divisors (82807).

142561673 is an equidigital number, since it uses as much as digits as its factorization.

142561673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82806.

The product of its digits is 30240, while the sum is 35.

The square root of 142561673 is about 11939.9193045849. The cubic root of 142561673 is about 522.3973049699.

The spelling of 142561673 in words is "one hundred forty-two million, five hundred sixty-one thousand, six hundred seventy-three".