1201729536 has 156 divisors (see below), whose sum is σ = 3967982512. Its totient is φ = 343277568.

The previous prime is 1201729513. The next prime is 1201729547. The reversal of 1201729536 is 6359271021.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1201729536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255720 + ... + 260376.

Almost surely, 2^1201729536 is an apocalyptic number.

1201729536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201729536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1983991256).

1201729536 is an abundant number, since it is smaller than the sum of its proper divisors (2766252976).

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

1201729536 is an equidigital number, since it uses as much as digits as its factorization.

1201729536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4694 (or 4669 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1201729536 is about 34665.9708648121. The cubic root of 1201729536 is about 1063.1688536210.

The spelling of 1201729536 in words is "one billion, two hundred one million, seven hundred twenty-nine thousand, five hundred thirty-six".