70442281 has 16 divisors (see below), whose sum is σ = 87337600. Its totient is φ = 55323648.

The previous prime is 70442257. The next prime is 70442287. The reversal of 70442281 is 18224407.

It is a cyclic number.

It is not a de Polignac number, because 70442281 - 2¹⁹ = 69917993 is a prime.

It is a super-2 number, since 2×70442281² = 9924229904965922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70442287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9865 + ... + 15433.

It is an arithmetic number, because the mean of its divisors is an integer number (5458600).

Almost surely, 2^70442281 is an apocalyptic number.

It is an amenable number.

70442281 is a deficient number, since it is larger than the sum of its proper divisors (16895319).

70442281 is a wasteful number, since it uses less digits than its factorization.

70442281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 70442281 is about 8392.9899916537. The cubic root of 70442281 is about 412.9946922069.

Adding to 70442281 its reverse (18224407), we get a palindrome (88666688).

The spelling of 70442281 in words is "seventy million, four hundred forty-two thousand, two hundred eighty-one".