1242541 has 4 divisors (see below), whose sum is σ = 1245312. Its totient is φ = 1239772.

The previous prime is 1242517. The next prime is 1242569. The reversal of 1242541 is 1452421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1242541 - 2⁷ = 1242413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541 + ... + 1666.

It is an arithmetic number, because the mean of its divisors is an integer number (311328).

2^1242541 is an apocalyptic number.

It is an amenable number.

1242541 is a deficient number, since it is larger than the sum of its proper divisors (2771).

1242541 is an equidigital number, since it uses as much as digits as its factorization.

1242541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770.

The product of its digits is 320, while the sum is 19.

The square root of 1242541 is about 1114.6932313421. The cubic root of 1242541 is about 107.5070411829.

Adding to 1242541 its reverse (1452421), we get a palindrome (2694962).

The spelling of 1242541 in words is "one million, two hundred forty-two thousand, five hundred forty-one".