70142881 has 2 divisors, whose sum is σ = 70142882. Its totient is φ = 70142880.

The previous prime is 70142873. The next prime is 70142899. The reversal of 70142881 is 18824107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51609856 + 18533025 = 7184^2 + 4305^2 .

It is an emirp because it is prime and its reverse (18824107) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70142881 - 2³ = 70142873 is a prime.

It is a super-2 number, since 2×70142881² = 9840047509960322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70142081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35071440 + 35071441.

It is an arithmetic number, because the mean of its divisors is an integer number (35071441).

Almost surely, 2^70142881 is an apocalyptic number.

It is an amenable number.

70142881 is a deficient number, since it is larger than the sum of its proper divisors (1).

70142881 is an equidigital number, since it uses as much as digits as its factorization.

70142881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 70142881 is about 8375.1346854842. The cubic root of 70142881 is about 412.4087457767.

Adding to 70142881 its reverse (18824107), we get a palindrome (88966988).

The spelling of 70142881 in words is "seventy million, one hundred forty-two thousand, eight hundred eighty-one".