1540740 has 24 divisors (see below), whose sum is σ = 4314240. Its totient is φ = 410848.

The previous prime is 1540711. The next prime is 1540751. The reversal of 1540740 is 470451.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12780 + ... + 12899.

It is an arithmetic number, because the mean of its divisors is an integer number (179760).

2^1540740 is an apocalyptic number.

1540740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540740 is an abundant number, since it is smaller than the sum of its proper divisors (2773500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1540740 is a wasteful number, since it uses less digits than its factorization.

1540740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25691 (or 25689 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 1540740 is about 1241.2654832871. The cubic root of 1540740 is about 115.4985288694.

It can be divided in two parts, 15 and 40740, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 1540740 in words is "one million, five hundred forty thousand, seven hundred forty".