1266150861 has 24 divisors (see below), whose sum is σ = 1939028000. Its totient is φ = 793906272.

The previous prime is 1266150859. The next prime is 1266150863. The reversal of 1266150861 is 1680516621.

It is an interprime number because it is at equal distance from previous prime (1266150859) and next prime (1266150863).

It is not a de Polignac number, because 1266150861 - 2¹ = 1266150859 is a prime.

It is a super-2 number, since 2×1266150861² = 3206276005622082642, 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 (1266150863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2866 + ... + 50403.

Almost surely, 2^1266150861 is an apocalyptic number.

It is an amenable number.

1266150861 is a deficient number, since it is larger than the sum of its proper divisors (672877139).

1266150861 is a wasteful number, since it uses less digits than its factorization.

1266150861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53433 (or 53430 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1266150861 is about 35583.0136582049. The cubic root of 1266150861 is about 1081.8369688980.

The spelling of 1266150861 in words is "one billion, two hundred sixty-six million, one hundred fifty thousand, eight hundred sixty-one".