1201279536 has 30 divisors (see below), whose sum is σ = 3361914660. Its totient is φ = 400426464.

The previous prime is 1201279531. The next prime is 1201279559. The reversal of 1201279536 is 6359721021.

It is a super-2 number, since 2×1201279536² = 2886145047224750592, which contains 22 as substring.

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 1201279536.

It is not an unprimeable number, because it can be changed into a prime (1201279531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4170966 + ... + 4171253.

It is an arithmetic number, because the mean of its divisors is an integer number (112063822).

Almost surely, 2^1201279536 is an apocalyptic number.

1201279536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1201279536 is an abundant number, since it is smaller than the sum of its proper divisors (2160635124).

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

1201279536 is a wasteful number, since it uses less digits than its factorization.

1201279536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8342233 (or 8342224 counting only the distinct ones).

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

The square root of 1201279536 is about 34659.4797422004. The cubic root of 1201279536 is about 1063.0361322115.

The spelling of 1201279536 in words is "one billion, two hundred one million, two hundred seventy-nine thousand, five hundred thirty-six".