1201388771 has 8 divisors (see below), whose sum is σ = 1355799600. Its totient is φ = 1054510240.

The previous prime is 1201388743. The next prime is 1201388777. The reversal of 1201388771 is 1778831021.

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 1201388771 - 2⁶ = 1201388707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201388777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1882736 + ... + 1883373.

It is an arithmetic number, because the mean of its divisors is an integer number (169474950).

Almost surely, 2^1201388771 is an apocalyptic number.

1201388771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201388771 is a deficient number, since it is larger than the sum of its proper divisors (154410829).

1201388771 is a wasteful number, since it uses less digits than its factorization.

1201388771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766149.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 1201388771 is about 34661.0555378800. The cubic root of 1201388771 is about 1063.0683526422.

The spelling of 1201388771 in words is "one billion, two hundred one million, three hundred eighty-eight thousand, seven hundred seventy-one".