1540605451 has 8 divisors (see below), whose sum is σ = 1920754944. Its totient is φ = 1200471720.

The previous prime is 1540605401. The next prime is 1540605487. The reversal of 1540605451 is 1545060451.

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

It is not a de Polignac number, because 1540605451 - 2¹³ = 1540597259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540605401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10003855 + ... + 10004008.

It is an arithmetic number, because the mean of its divisors is an integer number (240094368).

Almost surely, 2^1540605451 is an apocalyptic number.

1540605451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1540605451 is a deficient number, since it is larger than the sum of its proper divisors (380149493).

1540605451 is a wasteful number, since it uses less digits than its factorization.

1540605451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20007881.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1540605451 is about 39250.5471426832. The cubic root of 1540605451 is about 1154.9516670491.

The spelling of 1540605451 in words is "one billion, five hundred forty million, six hundred five thousand, four hundred fifty-one".