70871261 has 2 divisors, whose sum is σ = 70871262. Its totient is φ = 70871260.

The previous prime is 70871219. The next prime is 70871287. The reversal of 70871261 is 16217807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 6791236 = 8005^2 + 2606^2 .

It is an emirp because it is prime and its reverse (16217807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70871261 - 2¹⁴ = 70854877 is a prime.

It is a Chen prime.

It is equal to p_4166258 and since 70871261 and 4166258 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70871201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35435630 + 35435631.

It is an arithmetic number, because the mean of its divisors is an integer number (35435631).

Almost surely, 2^70871261 is an apocalyptic number.

It is an amenable number.

70871261 is a deficient number, since it is larger than the sum of its proper divisors (1).

70871261 is an equidigital number, since it uses as much as digits as its factorization.

70871261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 70871261 is about 8418.5070529162. The cubic root of 70871261 is about 413.8313489976.

The spelling of 70871261 in words is "seventy million, eight hundred seventy-one thousand, two hundred sixty-one".