1281664241 has 16 divisors (see below), whose sum is σ = 1508528448. Its totient is φ = 1073524800.

The previous prime is 1281664211. The next prime is 1281664249. The reversal of 1281664241 is 1424661821.

It is a cyclic number.

It is not a de Polignac number, because 1281664241 - 2¹⁸ = 1281402097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281664249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71606 + ... + 87696.

It is an arithmetic number, because the mean of its divisors is an integer number (94283028).

Almost surely, 2^1281664241 is an apocalyptic number.

1281664241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1281664241 is a deficient number, since it is larger than the sum of its proper divisors (226864207).

1281664241 is a wasteful number, since it uses less digits than its factorization.

1281664241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16672.

The product of its digits is 18432, while the sum is 35.

The square root of 1281664241 is about 35800.3385598516. The cubic root of 1281664241 is about 1086.2374100399.

The spelling of 1281664241 in words is "one billion, two hundred eighty-one million, six hundred sixty-four thousand, two hundred forty-one".