1290540 has 48 divisors (see below), whose sum is σ = 3663072. Its totient is φ = 339456.

The previous prime is 1290539. The next prime is 1290551. The reversal of 1290540 is 450921.

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, 8142 + ... + 8298.

It is an arithmetic number, because the mean of its divisors is an integer number (76314).

2^1290540 is an apocalyptic number.

1290540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1290540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1831536).

1290540 is an abundant number, since it is smaller than the sum of its proper divisors (2372532).

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

1290540 is a wasteful number, since it uses less digits than its factorization.

1290540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1290540 is about 1136.0193660321. The cubic root of 1290540 is about 108.8739108156.

It can be divided in two parts, 1290 and 540, that added together give a triangular number (1830 = T₆₀).

The spelling of 1290540 in words is "one million, two hundred ninety thousand, five hundred forty".