1201297536 has 96 divisors (see below), whose sum is σ = 3537396720. Its totient is φ = 391104000.

The previous prime is 1201297507. The next prime is 1201297547. The reversal of 1201297536 is 6357921021.

1201297536 is a `hidden beast` number, since 1 + 20 + 12 + 97 + 536 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

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 1201297536.

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, 37411 + ... + 61661.

Almost surely, 2^1201297536 is an apocalyptic number.

1201297536 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 1201297536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768698360).

1201297536 is an abundant number, since it is smaller than the sum of its proper divisors (2336099184).

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

1201297536 is a wasteful number, since it uses less digits than its factorization.

1201297536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24314 (or 24299 counting only the distinct ones).

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

The square root of 1201297536 is about 34659.7394104457. The cubic root of 1201297536 is about 1063.0414417042.

The spelling of 1201297536 in words is "one billion, two hundred one million, two hundred ninety-seven thousand, five hundred thirty-six".