1201598685 has 64 divisors (see below), whose sum is σ = 2500968960. Its totient is φ = 535887360.

The previous prime is 1201598681. The next prime is 1201598687. The reversal of 1201598685 is 5868951021.

It is a happy number.

It is not a de Polignac number, because 1201598685 - 2² = 1201598681 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 1201598685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201598681) 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 63 ways as a sum of consecutive naturals, for example, 23239 + ... + 54251.

It is an arithmetic number, because the mean of its divisors is an integer number (39077640).

Almost surely, 2^1201598685 is an apocalyptic number.

1201598685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201598685 is an abundant number, since it is smaller than the sum of its proper divisors (1299370275).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201598685 is a wasteful number, since it uses less digits than its factorization.

1201598685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31075 (or 31069 counting only the distinct ones).

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

The square root of 1201598685 is about 34664.0835015149. The cubic root of 1201598685 is about 1063.1302643065.

The spelling of 1201598685 in words is "one billion, two hundred one million, five hundred ninety-eight thousand, six hundred eighty-five".