70745242 has 4 divisors (see below), whose sum is σ = 106117866. Its totient is φ = 35372620.

The previous prime is 70745219. The next prime is 70745273. The reversal of 70745242 is 24254707.

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

It can be written as a sum of positive squares in only one way, i.e., 59582961 + 11162281 = 7719^2 + 3341^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17686309 + ... + 17686312.

Almost surely, 2^70745242 is an apocalyptic number.

70745242 is a deficient number, since it is larger than the sum of its proper divisors (35372624).

70745242 is a wasteful number, since it uses less digits than its factorization.

70745242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35372623.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 70745242 is about 8411.0190821327. The cubic root of 70745242 is about 413.5859201597.

Adding to 70745242 its reverse (24254707), we get a palindrome (94999949).

The spelling of 70745242 in words is "seventy million, seven hundred forty-five thousand, two hundred forty-two".