11421457 has 4 divisors (see below), whose sum is σ = 11608756. Its totient is φ = 11234160.

The previous prime is 11421437. The next prime is 11421461. The reversal of 11421457 is 75412411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75412411 = 43 ⋅1753777.

It can be written as a sum of positive squares in 2 ways, for example, as 1175056 + 10246401 = 1084^2 + 3201^2 .

It is a cyclic number.

It is not a de Polignac number, because 11421457 - 2¹⁹ = 10897169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11421437) 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, 93558 + ... + 93679.

It is an arithmetic number, because the mean of its divisors is an integer number (2902189).

Almost surely, 2^11421457 is an apocalyptic number.

It is an amenable number.

11421457 is a deficient number, since it is larger than the sum of its proper divisors (187299).

11421457 is an equidigital number, since it uses as much as digits as its factorization.

11421457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187298.

The product of its digits is 1120, while the sum is 25.

The square root of 11421457 is about 3379.5646169292. The cubic root of 11421457 is about 225.2028261610.

Adding to 11421457 its reverse (75412411), we get a palindrome (86833868).

The spelling of 11421457 in words is "eleven million, four hundred twenty-one thousand, four hundred fifty-seven".