1291060165 has 32 divisors (see below), whose sum is σ = 1675681920. Its totient is φ = 951761664.

The previous prime is 1291060063. The next prime is 1291060171. The reversal of 1291060165 is 5610601921.

It is a cyclic number.

It is not a de Polignac number, because 1291060165 - 2⁷ = 1291060037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1294447 + ... + 1295443.

It is an arithmetic number, because the mean of its divisors is an integer number (52365060).

Almost surely, 2^1291060165 is an apocalyptic number.

It is an amenable number.

1291060165 is a deficient number, since it is larger than the sum of its proper divisors (384621755).

1291060165 is a wasteful number, since it uses less digits than its factorization.

1291060165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 1291060165 is about 35931.3256782992. The cubic root of 1291060165 is about 1088.8853642215.

The spelling of 1291060165 in words is "one billion, two hundred ninety-one million, sixty thousand, one hundred sixty-five".