1449157491 has 24 divisors (see below), whose sum is σ = 2144965680. Its totient is φ = 942290496.

The previous prime is 1449157487. The next prime is 1449157513. The reversal of 1449157491 is 1947519441.

1449157491 is a `hidden beast` number, since 1 + 4 + 4 + 9 + 157 + 491 = 666.

It is not a de Polignac number, because 1449157491 - 2² = 1449157487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1449157421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 318565 + ... + 323081.

It is an arithmetic number, because the mean of its divisors is an integer number (89373570).

Almost surely, 2^1449157491 is an apocalyptic number.

1449157491 is a deficient number, since it is larger than the sum of its proper divisors (695808189).

1449157491 is a wasteful number, since it uses less digits than its factorization.

1449157491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395 (or 5392 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 1449157491 is about 38067.8012367407. The cubic root of 1449157491 is about 1131.6319362914.

The spelling of 1449157491 in words is "one billion, four hundred forty-nine million, one hundred fifty-seven thousand, four hundred ninety-one".