1243541 has 8 divisors (see below), whose sum is σ = 1397760. Its totient is φ = 1097712.

The previous prime is 1243537. The next prime is 1243547. The reversal of 1243541 is 1453421.

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 1243541 - 2² = 1243537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243547) 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, 1781 + ... + 2378.

It is an arithmetic number, because the mean of its divisors is an integer number (174720).

2^1243541 is an apocalyptic number.

It is an amenable number.

1243541 is a deficient number, since it is larger than the sum of its proper divisors (154219).

1243541 is a wasteful number, since it uses less digits than its factorization.

1243541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195.

The product of its digits is 480, while the sum is 20.

The square root of 1243541 is about 1115.1416950325. The cubic root of 1243541 is about 107.5358740916.

Adding to 1243541 its reverse (1453421), we get a palindrome (2696962).

The spelling of 1243541 in words is "one million, two hundred forty-three thousand, five hundred forty-one".