1201965885 has 40 divisors (see below), whose sum is σ = 2204774880. Its totient is φ = 626131296.

The previous prime is 1201965857. The next prime is 1201965907. The reversal of 1201965885 is 5885691021.

It is a happy number.

1201965885 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1201965885 - 2⁸ = 1201965629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1201965885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17095 + ... + 51924.

It is an arithmetic number, because the mean of its divisors is an integer number (55119372).

Almost surely, 2^1201965885 is an apocalyptic number.

1201965885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201965885 is a deficient number, since it is larger than the sum of its proper divisors (1002808995).

1201965885 is an equidigital number, since it uses as much as digits as its factorization.

1201965885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69079 (or 69070 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The square root of 1201965885 is about 34669.3796454451. The cubic root of 1201965885 is about 1063.2385482892.

The spelling of 1201965885 in words is "one billion, two hundred one million, nine hundred sixty-five thousand, eight hundred eighty-five".