1912715261 has 2 divisors, whose sum is σ = 1912715262. Its totient is φ = 1912715260.

The previous prime is 1912715257. The next prime is 1912715291. The reversal of 1912715261 is 1625172191.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1891380100 + 21335161 = 43490^2 + 4619^2 .

It is an emirp because it is prime and its reverse (1625172191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1912715261 - 2² = 1912715257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1912715291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956357630 + 956357631.

It is an arithmetic number, because the mean of its divisors is an integer number (956357631).

Almost surely, 2^1912715261 is an apocalyptic number.

It is an amenable number.

1912715261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912715261 is an equidigital number, since it uses as much as digits as its factorization.

1912715261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 35.

The square root of 1912715261 is about 43734.6002725531. The cubic root of 1912715261 is about 1241.3191089413.

The spelling of 1912715261 in words is "one billion, nine hundred twelve million, seven hundred fifteen thousand, two hundred sixty-one".