1540421535 has 16 divisors (see below), whose sum is σ = 2470892256. Its totient is φ = 819485568.

The previous prime is 1540421513. The next prime is 1540421539. The reversal of 1540421535 is 5351240451.

1540421535 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1540421535 - 2⁵ = 1540421503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540421539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123384 + ... + 135293.

It is an arithmetic number, because the mean of its divisors is an integer number (154430766).

Almost surely, 2^1540421535 is an apocalyptic number.

1540421535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1540421535 is a deficient number, since it is larger than the sum of its proper divisors (930470721).

1540421535 is a wasteful number, since it uses less digits than its factorization.

1540421535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259082.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1540421535 is about 39248.2042264356. The cubic root of 1540421535 is about 1154.9057062130.

Adding to 1540421535 its reverse (5351240451), we get a palindrome (6891661986).

The spelling of 1540421535 in words is "one billion, five hundred forty million, four hundred twenty-one thousand, five hundred thirty-five".