1266801481 has 8 divisors (see below), whose sum is σ = 1411369344. Its totient is φ = 1127134320.

The previous prime is 1266801469. The next prime is 1266801493. The reversal of 1266801481 is 1841086621.

It is an interprime number because it is at equal distance from previous prime (1266801469) and next prime (1266801493).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266801481 - 2¹⁹ = 1266277193 is a prime.

It is a super-2 number, since 2×1266801481² = 3209571984527586722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1266801481.

It is not an unprimeable number, because it can be changed into a prime (1266801401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1224630 + ... + 1225663.

It is an arithmetic number, because the mean of its divisors is an integer number (176421168).

Almost surely, 2^1266801481 is an apocalyptic number.

1266801481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1266801481 is a deficient number, since it is larger than the sum of its proper divisors (144567863).

1266801481 is a wasteful number, since it uses less digits than its factorization.

1266801481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450351.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 1266801481 is about 35592.1547675889. The cubic root of 1266801481 is about 1082.0222401962.

The spelling of 1266801481 in words is "one billion, two hundred sixty-six million, eight hundred one thousand, four hundred eighty-one".