142474021 has 2 divisors, whose sum is σ = 142474022. Its totient is φ = 142474020.

The previous prime is 142474019. The next prime is 142474037. The reversal of 142474021 is 120474241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95277121 + 47196900 = 9761^2 + 6870^2 .

It is a cyclic number.

It is not a de Polignac number, because 142474021 - 2¹ = 142474019 is a prime.

It is a super-3 number, since 3×142474021³ (a number of 25 digits) contains 333 as substring.

Together with 142474019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142474001) 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, 71237010 + 71237011.

It is an arithmetic number, because the mean of its divisors is an integer number (71237011).

Almost surely, 2^142474021 is an apocalyptic number.

It is an amenable number.

142474021 is a deficient number, since it is larger than the sum of its proper divisors (1).

142474021 is an equidigital number, since it uses as much as digits as its factorization.

142474021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 142474021 is about 11936.2481961461. The cubic root of 142474021 is about 522.2902201902.

The spelling of 142474021 in words is "one hundred forty-two million, four hundred seventy-four thousand, twenty-one".