1540065 has 16 divisors (see below), whose sum is σ = 2495808. Its totient is φ = 810816.

The previous prime is 1540039. The next prime is 1540073. The reversal of 1540065 is 5600451.

It is a happy number.

It is not a de Polignac number, because 1540065 - 2¹² = 1535969 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627 + ... + 1863.

It is an arithmetic number, because the mean of its divisors is an integer number (155988).

2^1540065 is an apocalyptic number.

1540065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1540065 is a deficient number, since it is larger than the sum of its proper divisors (955743).

1540065 is a wasteful number, since it uses less digits than its factorization.

1540065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1540065 is about 1240.9935535691. The cubic root of 1540065 is about 115.4816597254.

The spelling of 1540065 in words is "one million, five hundred forty thousand, sixty-five".