70191245 has 4 divisors (see below), whose sum is σ = 84229500. Its totient is φ = 56152992.

The previous prime is 70191217. The next prime is 70191259. The reversal of 70191245 is 54219107.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54219107 = 109 ⋅497423.

It can be written as a sum of positive squares in 2 ways, for example, as 25421764 + 44769481 = 5042^2 + 6691^2 .

It is a cyclic number.

It is not a de Polignac number, because 70191245 - 2¹⁶ = 70125709 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7019120 + ... + 7019129.

It is an arithmetic number, because the mean of its divisors is an integer number (21057375).

Almost surely, 2^70191245 is an apocalyptic number.

It is an amenable number.

70191245 is a deficient number, since it is larger than the sum of its proper divisors (14038255).

70191245 is a wasteful number, since it uses less digits than its factorization.

70191245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14038254.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 70191245 is about 8378.0215444937. The cubic root of 70191245 is about 412.5035102242.

The spelling of 70191245 in words is "seventy million, one hundred ninety-one thousand, two hundred forty-five".