1540040265 has 24 divisors (see below), whose sum is σ = 2676705408. Its totient is φ = 819108000.

The previous prime is 1540040209. The next prime is 1540040287. The reversal of 1540040265 is 5620400451.

It is not a de Polignac number, because 1540040265 - 2⁸ = 1540040009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30111 + ... + 63140.

It is an arithmetic number, because the mean of its divisors is an integer number (111529392).

Almost surely, 2^1540040265 is an apocalyptic number.

1540040265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1540040265 is a deficient number, since it is larger than the sum of its proper divisors (1136665143).

1540040265 is a wasteful number, since it uses less digits than its factorization.

1540040265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93629 (or 93626 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1540040265 is about 39243.3467609479. The cubic root of 1540040265 is about 1154.8104147138.

The spelling of 1540040265 in words is "one billion, five hundred forty million, forty thousand, two hundred sixty-five".