142066541 has 4 divisors (see below), whose sum is σ = 144012732. Its totient is φ = 140120352.

The previous prime is 142066531. The next prime is 142066543. The reversal of 142066541 is 145660241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145660241 = 4691 ⋅31051.

It can be written as a sum of positive squares in 2 ways, for example, as 116856100 + 25210441 = 10810^2 + 5021^2 .

It is a cyclic number.

It is not a de Polignac number, because 142066541 - 2¹⁴ = 142050157 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 (142066543) 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, 972986 + ... + 973131.

It is an arithmetic number, because the mean of its divisors is an integer number (36003183).

Almost surely, 2^142066541 is an apocalyptic number.

It is an amenable number.

142066541 is a deficient number, since it is larger than the sum of its proper divisors (1946191).

142066541 is an equidigital number, since it uses as much as digits as its factorization.

142066541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946190.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 142066541 is about 11919.1669591461. The cubic root of 142066541 is about 521.7918228130.

The spelling of 142066541 in words is "one hundred forty-two million, sixty-six thousand, five hundred forty-one".