142920061 has 2 divisors, whose sum is σ = 142920062. Its totient is φ = 142920060.

The previous prime is 142920053. The next prime is 142920079. The reversal of 142920061 is 160029241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104244100 + 38675961 = 10210^2 + 6219^2 .

It is an emirp because it is prime and its reverse (160029241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142920061 - 2³ = 142920053 is a prime.

It is a super-2 number, since 2×142920061² = 40852287672487442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142920461) 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 as a sum of consecutive naturals, namely, 71460030 + 71460031.

It is an arithmetic number, because the mean of its divisors is an integer number (71460031).

Almost surely, 2^142920061 is an apocalyptic number.

It is an amenable number.

142920061 is a deficient number, since it is larger than the sum of its proper divisors (1).

142920061 is an equidigital number, since it uses as much as digits as its factorization.

142920061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 142920061 is about 11954.9178583544. The cubic root of 142920061 is about 522.8346928837.

The spelling of 142920061 in words is "one hundred forty-two million, nine hundred twenty thousand, sixty-one".