142214509 has 2 divisors, whose sum is σ = 142214510. Its totient is φ = 142214508.

The previous prime is 142214483. The next prime is 142214539. The reversal of 142214509 is 905412241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125933284 + 16281225 = 11222^2 + 4035^2 .

It is a cyclic number.

It is not a de Polignac number, because 142214509 - 2¹¹ = 142212461 is a prime.

It is a super-2 number, since 2×142214509² = 40449933140222162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142214539) 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, 71107254 + 71107255.

It is an arithmetic number, because the mean of its divisors is an integer number (71107255).

Almost surely, 2^142214509 is an apocalyptic number.

It is an amenable number.

142214509 is a deficient number, since it is larger than the sum of its proper divisors (1).

142214509 is an equidigital number, since it uses as much as digits as its factorization.

142214509 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 142214509 is about 11925.3724889414. The cubic root of 142214509 is about 521.9729156590.

It can be divided in two parts, 1422 and 14509, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 142214509 in words is "one hundred forty-two million, two hundred fourteen thousand, five hundred nine".