1266206141 has 2 divisors, whose sum is σ = 1266206142. Its totient is φ = 1266206140.

The previous prime is 1266206107. The next prime is 1266206159. The reversal of 1266206141 is 1416026621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1072300516 + 193905625 = 32746^2 + 13925^2 .

It is an emirp because it is prime and its reverse (1416026621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1266206141 - 2¹⁸ = 1265943997 is a prime.

It is a super-2 number, since 2×1266206141² = 3206555983012223762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266206171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633103070 + 633103071.

It is an arithmetic number, because the mean of its divisors is an integer number (633103071).

Almost surely, 2^1266206141 is an apocalyptic number.

It is an amenable number.

1266206141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266206141 is an equidigital number, since it uses as much as digits as its factorization.

1266206141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1266206141 is about 35583.7904248550. The cubic root of 1266206141 is about 1081.8527129611.

The spelling of 1266206141 in words is "one billion, two hundred sixty-six million, two hundred six thousand, one hundred forty-one".