1540261009 has 24 divisors (see below), whose sum is σ = 1837733184. Its totient is φ = 1264428000.

The previous prime is 1540261001. The next prime is 1540261103. The reversal of 1540261009 is 9001620451.

It is not a de Polignac number, because 1540261009 - 2³ = 1540261001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1540261001) 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, 678294 + ... + 680560.

It is an arithmetic number, because the mean of its divisors is an integer number (76572216).

Almost surely, 2^1540261009 is an apocalyptic number.

It is an amenable number.

1540261009 is a deficient number, since it is larger than the sum of its proper divisors (297472175).

1540261009 is a wasteful number, since it uses less digits than its factorization.

1540261009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437 (or 2406 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1540261009 is about 39246.1591623945. The cubic root of 1540261009 is about 1154.8655875768.

The spelling of 1540261009 in words is "one billion, five hundred forty million, two hundred sixty-one thousand, nine".