70158145 has 4 divisors (see below), whose sum is σ = 84189780. Its totient is φ = 56126512.

The previous prime is 70158131. The next prime is 70158149. The reversal of 70158145 is 54185107.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54185107 = 103 ⋅526069.

It can be written as a sum of positive squares in 2 ways, for example, as 9878449 + 60279696 = 3143^2 + 7764^2 .

It is a cyclic number.

It is not a de Polignac number, because 70158145 - 2¹³ = 70149953 is a prime.

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 not an unprimeable number, because it can be changed into a prime (70158149) by changing a digit.

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, 7015810 + ... + 7015819.

It is an arithmetic number, because the mean of its divisors is an integer number (21047445).

Almost surely, 2^70158145 is an apocalyptic number.

It is an amenable number.

70158145 is a deficient number, since it is larger than the sum of its proper divisors (14031635).

70158145 is a wasteful number, since it uses less digits than its factorization.

70158145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14031634.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 70158145 is about 8376.0459048408. The cubic root of 70158145 is about 412.4386587697.

The spelling of 70158145 in words is "seventy million, one hundred fifty-eight thousand, one hundred forty-five".