142240061 has 4 divisors (see below), whose sum is σ = 149726400. Its totient is φ = 134753724.

The previous prime is 142240039. The next prime is 142240103. The reversal of 142240061 is 160042241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 160042241 = 149 ⋅1074109.

It is a cyclic number.

It is not a de Polignac number, because 142240061 - 2¹⁴ = 142223677 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 (142240361) 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, 3743141 + ... + 3743178.

It is an arithmetic number, because the mean of its divisors is an integer number (37431600).

Almost surely, 2^142240061 is an apocalyptic number.

It is an amenable number.

142240061 is a deficient number, since it is larger than the sum of its proper divisors (7486339).

142240061 is an equidigital number, since it uses as much as digits as its factorization.

142240061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7486338.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 142240061 is about 11926.4437700431. The cubic root of 142240061 is about 522.0041751353.

The spelling of 142240061 in words is "one hundred forty-two million, two hundred forty thousand, sixty-one".