70634261 has 4 divisors (see below), whose sum is σ = 70669452. Its totient is φ = 70599072.

The previous prime is 70634243. The next prime is 70634273. The reversal of 70634261 is 16243607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16243607 = 131 ⋅123997.

It can be written as a sum of positive squares in 2 ways, for example, as 28462225 + 42172036 = 5335^2 + 6494^2 .

It is a cyclic number.

It is not a de Polignac number, because 70634261 - 2⁶ = 70634197 is a prime.

It is a super-2 number, since 2×70634261² = 9978397654032242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70633261) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 14390 + ... + 18663.

It is an arithmetic number, because the mean of its divisors is an integer number (17667363).

Almost surely, 2^70634261 is an apocalyptic number.

It is an amenable number.

70634261 is a deficient number, since it is larger than the sum of its proper divisors (35191).

70634261 is a wasteful number, since it uses less digits than its factorization.

70634261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35190.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 70634261 is about 8404.4191351931. The cubic root of 70634261 is about 413.3695371658.

Adding to 70634261 its reverse (16243607), we get a palindrome (86877868).

The spelling of 70634261 in words is "seventy million, six hundred thirty-four thousand, two hundred sixty-one".