142205149 has 2 divisors, whose sum is σ = 142205150. Its totient is φ = 142205148.

The previous prime is 142205143. The next prime is 142205191. The reversal of 142205149 is 941502241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136469124 + 5736025 = 11682^2 + 2395^2 .

It is an emirp because it is prime and its reverse (941502241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142205149 - 2⁵ = 142205117 is a prime.

It is a super-2 number, since 2×142205149² = 40444608804224402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142205143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71102574 + 71102575.

It is an arithmetic number, because the mean of its divisors is an integer number (71102575).

Almost surely, 2^142205149 is an apocalyptic number.

It is an amenable number.

142205149 is a deficient number, since it is larger than the sum of its proper divisors (1).

142205149 is an equidigital number, since it uses as much as digits as its factorization.

142205149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 142205149 is about 11924.9800419120. The cubic root of 142205149 is about 521.9614640059.

The spelling of 142205149 in words is "one hundred forty-two million, two hundred five thousand, one hundred forty-nine".