1278541 has 8 divisors (see below), whose sum is σ = 1425024. Its totient is φ = 1137120.

The previous prime is 1278527. The next prime is 1278551. The reversal of 1278541 is 1458721.

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

It is a cyclic number.

It is not a de Polignac number, because 1278541 - 2⁹ = 1278029 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278551) 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, 720 + ... + 1753.

It is an arithmetic number, because the mean of its divisors is an integer number (178128).

2^1278541 is an apocalyptic number.

1278541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1278541 is a deficient number, since it is larger than the sum of its proper divisors (146483).

1278541 is a wasteful number, since it uses less digits than its factorization.

1278541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531.

The product of its digits is 2240, while the sum is 28.

The square root of 1278541 is about 1130.7258730568. The cubic root of 1278541 is about 108.5354354869.

It can be divided in two parts, 127 and 8541, that added together give a palindrome (8668).

The spelling of 1278541 in words is "one million, two hundred seventy-eight thousand, five hundred forty-one".