1541840 has 20 divisors (see below), whose sum is σ = 3584964. Its totient is φ = 616704.

The previous prime is 1541821. The next prime is 1541863. The reversal of 1541840 is 481451.

It can be written as a sum of positive squares in 2 ways, for example, as 781456 + 760384 = 884^2 + 872^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9557 + ... + 9716.

2^1541840 is an apocalyptic number.

1541840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1541840 is an abundant number, since it is smaller than the sum of its proper divisors (2043124).

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

1541840 is a wasteful number, since it uses less digits than its factorization.

1541840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19286 (or 19280 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1541840 is about 1241.7085004138. The cubic root of 1541840 is about 115.5260087727.

The spelling of 1541840 in words is "one million, five hundred forty-one thousand, eight hundred forty".