1253540 has 24 divisors (see below), whose sum is σ = 2653560. Its totient is φ = 497408.

The previous prime is 1253521. The next prime is 1253557. The reversal of 1253540 is 453521.

It can be written as a sum of positive squares in 4 ways, for example, as 12544 + 1240996 = 112^2 + 1114^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4526 + ... + 4794.

It is an arithmetic number, because the mean of its divisors is an integer number (110565).

2^1253540 is an apocalyptic number.

1253540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253540 is an abundant number, since it is smaller than the sum of its proper divisors (1400020).

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

1253540 is a wasteful number, since it uses less digits than its factorization.

1253540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1253540 is about 1119.6160056019. The cubic root of 1253540 is about 107.8233279750.

The spelling of 1253540 in words is "one million, two hundred fifty-three thousand, five hundred forty".