142479870581 has 4 divisors (see below), whose sum is σ = 146330677932. Its totient is φ = 138629063232.

The previous prime is 142479870571. The next prime is 142479870593. The reversal of 142479870581 is 185078974241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69345322225 + 73134548356 = 263335^2 + 270434^2 .

It is a cyclic number.

It is not a de Polignac number, because 142479870581 - 2¹⁸ = 142479608437 is a prime.

It is a super-2 number, since 2×142479870581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142479870521) 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, 1925403620 + ... + 1925403693.

It is an arithmetic number, because the mean of its divisors is an integer number (36582669483).

Almost surely, 2^142479870581 is an apocalyptic number.

It is an amenable number.

142479870581 is a deficient number, since it is larger than the sum of its proper divisors (3850807351).

142479870581 is an equidigital number, since it uses as much as digits as its factorization.

142479870581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850807350.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 142479870581 in words is "one hundred forty-two billion, four hundred seventy-nine million, eight hundred seventy thousand, five hundred eighty-one".