1201564649 has 8 divisors (see below), whose sum is σ = 1205755200. Its totient is φ = 1197382576.

The previous prime is 1201564601. The next prime is 1201564673. The reversal of 1201564649 is 9464651021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201564649 - 2²⁴ = 1184787433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201564249) 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 7 ways as a sum of consecutive naturals, for example, 404042 + ... + 407004.

It is an arithmetic number, because the mean of its divisors is an integer number (150719400).

Almost surely, 2^1201564649 is an apocalyptic number.

It is an amenable number.

1201564649 is a deficient number, since it is larger than the sum of its proper divisors (4190551).

1201564649 is an equidigital number, since it uses as much as digits as its factorization.

1201564649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1201564649 is about 34663.5925576101. The cubic root of 1201564649 is about 1063.1202262786.

The spelling of 1201564649 in words is "one billion, two hundred one million, five hundred sixty-four thousand, six hundred forty-nine".