70081642 has 4 divisors (see below), whose sum is σ = 105122466. Its totient is φ = 35040820.

The previous prime is 70081601. The next prime is 70081651. The reversal of 70081642 is 24618007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24618007 = 3907 ⋅6301.

It can be written as a sum of positive squares in only one way, i.e., 52867441 + 17214201 = 7271^2 + 4149^2 .

It is a super-2 number, since 2×70081642² = 9822873090832328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70081642.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 17520409 + ... + 17520412.

Almost surely, 2^70081642 is an apocalyptic number.

70081642 is a deficient number, since it is larger than the sum of its proper divisors (35040824).

70081642 is a wasteful number, since it uses less digits than its factorization.

70081642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35040823.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 70081642 is about 8371.4778862516. The cubic root of 70081642 is about 412.2886915281.

Adding to 70081642 its reverse (24618007), we get a palindrome (94699649).

The spelling of 70081642 in words is "seventy million, eighty-one thousand, six hundred forty-two".