70752081 has 16 divisors (see below), whose sum is σ = 95606784. Its totient is φ = 46537344.

The previous prime is 70752049. The next prime is 70752109. The reversal of 70752081 is 18025707.

It is a happy number.

It is not a de Polignac number, because 70752081 - 2⁵ = 70752049 is a prime.

It is a super-2 number, since 2×70752081² = 10011713931661122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70752001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88375 + ... + 89171.

It is an arithmetic number, because the mean of its divisors is an integer number (5975424).

Almost surely, 2^70752081 is an apocalyptic number.

It is an amenable number.

70752081 is a deficient number, since it is larger than the sum of its proper divisors (24854703).

70752081 is a wasteful number, since it uses less digits than its factorization.

70752081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 70752081 is about 8411.4256223306. The cubic root of 70752081 is about 413.5992469592.

Adding to 70752081 its reverse (18025707), we get a palindrome (88777788).

It can be divided in two parts, 70 and 752081, that added together give a triangular number (752151 = T₁₂₂₆).

The spelling of 70752081 in words is "seventy million, seven hundred fifty-two thousand, eighty-one".