142019481 has 4 divisors (see below), whose sum is σ = 189359312. Its totient is φ = 94679652.

The previous prime is 142019461. The next prime is 142019519. The reversal of 142019481 is 184910241.

142019481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 142019481 - 2¹⁴ = 142003097 is a prime.

It is a super-2 number, since 2×142019481² = 40339065967018722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142019441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23669911 + ... + 23669916.

It is an arithmetic number, because the mean of its divisors is an integer number (47339828).

Almost surely, 2^142019481 is an apocalyptic number.

It is an amenable number.

142019481 is a deficient number, since it is larger than the sum of its proper divisors (47339831).

142019481 is an equidigital number, since it uses as much as digits as its factorization.

142019481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47339830.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 142019481 is about 11917.1926643820. The cubic root of 142019481 is about 521.7342013752.

The spelling of 142019481 in words is "one hundred forty-two million, nineteen thousand, four hundred eighty-one".