1201281566 has 8 divisors (see below), whose sum is σ = 1802070504. Its totient is φ = 600591400.

The previous prime is 1201281563. The next prime is 1201281581. The reversal of 1201281566 is 6651821021.

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

It is a super-2 number, since 2×1201281566² = 2886154801622824712, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201281563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29516 + ... + 57216.

It is an arithmetic number, because the mean of its divisors is an integer number (225258813).

Almost surely, 2^1201281566 is an apocalyptic number.

1201281566 is a deficient number, since it is larger than the sum of its proper divisors (600788938).

1201281566 is a wasteful number, since it uses less digits than its factorization.

1201281566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49386.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1201281566 is about 34659.5090271054. The cubic root of 1201281566 is about 1063.0367310069.

The spelling of 1201281566 in words is "one billion, two hundred one million, two hundred eighty-one thousand, five hundred sixty-six".