1203541 has 4 divisors (see below), whose sum is σ = 1224000. Its totient is φ = 1183084.

The previous prime is 1203533. The next prime is 1203557. The reversal of 1203541 is 1453021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1453021 = 103 ⋅14107.

It is a cyclic number.

It is not a de Polignac number, because 1203541 - 2³ = 1203533 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 (1203571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10141 + ... + 10258.

It is an arithmetic number, because the mean of its divisors is an integer number (306000).

2^1203541 is an apocalyptic number.

It is an amenable number.

1203541 is a deficient number, since it is larger than the sum of its proper divisors (20459).

1203541 is an equidigital number, since it uses as much as digits as its factorization.

1203541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20458.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1203541 is about 1097.0601624341. The cubic root of 1203541 is about 106.3702785528.

Adding to 1203541 its reverse (1453021), we get a palindrome (2656562).

The spelling of 1203541 in words is "one million, two hundred three thousand, five hundred forty-one".