1521049091 has 8 divisors (see below), whose sum is σ = 1548875568. Its totient is φ = 1493316000.

The previous prime is 1521049081. The next prime is 1521049157. The reversal of 1521049091 is 1909401251.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521049091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1521049001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9956 + ... + 56046.

It is an arithmetic number, because the mean of its divisors is an integer number (193609446).

Almost surely, 2^1521049091 is an apocalyptic number.

1521049091 is a deficient number, since it is larger than the sum of its proper divisors (27826477).

1521049091 is an equidigital number, since it uses as much as digits as its factorization.

1521049091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46693.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 1521049091 is about 39000.6293667166. The cubic root of 1521049091 is about 1150.0438775949.

The spelling of 1521049091 in words is "one billion, five hundred twenty-one million, forty-nine thousand, ninety-one".