1285541 has 8 divisors (see below), whose sum is σ = 1346520. Its totient is φ = 1225728.

The previous prime is 1285519. The next prime is 1285547. The reversal of 1285541 is 1455821.

It can be written as a sum of positive squares in 4 ways, for example, as 390625 + 894916 = 625^2 + 946^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2585 + ... + 3041.

It is an arithmetic number, because the mean of its divisors is an integer number (168315).

2^1285541 is an apocalyptic number.

It is an amenable number.

1285541 is a deficient number, since it is larger than the sum of its proper divisors (60979).

1285541 is an equidigital number, since it uses as much as digits as its factorization.

1285541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583.

The product of its digits is 1600, while the sum is 26.

The square root of 1285541 is about 1133.8170046352. The cubic root of 1285541 is about 108.7331519238.

The spelling of 1285541 in words is "one million, two hundred eighty-five thousand, five hundred forty-one".