142521019 has 2 divisors, whose sum is σ = 142521020. Its totient is φ = 142521018.

The previous prime is 142520971. The next prime is 142521059. The reversal of 142521019 is 910125241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142521019 - 2⁷ = 142520891 is a prime.

It is a super-2 number, since 2×142521019² = 40624481713596722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142520984 and 142521002.

It is not a weakly prime, because it can be changed into another prime (142521059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71260509 + 71260510.

It is an arithmetic number, because the mean of its divisors is an integer number (71260510).

Almost surely, 2^142521019 is an apocalyptic number.

142521019 is a deficient number, since it is larger than the sum of its proper divisors (1).

142521019 is an equidigital number, since it uses as much as digits as its factorization.

142521019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 142521019 is about 11938.2167428808. The cubic root of 142521019 is about 522.3476432839.

The spelling of 142521019 in words is "one hundred forty-two million, five hundred twenty-one thousand, nineteen".