1541221 has 4 divisors (see below), whose sum is σ = 1681344. Its totient is φ = 1401100.

The previous prime is 1541209. The next prime is 1541251. The reversal of 1541221 is 1221451.

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 1541221 - 2⁹ = 1540709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1541195 and 1541204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1541251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70045 + ... + 70066.

It is an arithmetic number, because the mean of its divisors is an integer number (420336).

2^1541221 is an apocalyptic number.

1541221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1541221 is a deficient number, since it is larger than the sum of its proper divisors (140123).

1541221 is a wasteful number, since it uses less digits than its factorization.

1541221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140122.

The product of its digits is 80, while the sum is 16.

The square root of 1541221 is about 1241.4592220448. The cubic root of 1541221 is about 115.5105466903.

Adding to 1541221 its reverse (1221451), we get a palindrome (2762672).

The spelling of 1541221 in words is "one million, five hundred forty-one thousand, two hundred twenty-one".