11421057 has 8 divisors (see below), whose sum is σ = 15277984. Its totient is φ = 7589088.

The previous prime is 11421037. The next prime is 11421061. The reversal of 11421057 is 75012411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11421057 - 2¹² = 11416961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11421017) 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, 5143 + ... + 7020.

It is an arithmetic number, because the mean of its divisors is an integer number (1909748).

Almost surely, 2^11421057 is an apocalyptic number.

It is an amenable number.

11421057 is a deficient number, since it is larger than the sum of its proper divisors (3856927).

11421057 is a wasteful number, since it uses less digits than its factorization.

11421057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12479.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 11421057 is about 3379.5054371905. The cubic root of 11421057 is about 225.2001971274.

Adding to 11421057 its reverse (75012411), we get a palindrome (86433468).

The spelling of 11421057 in words is "eleven million, four hundred twenty-one thousand, fifty-seven".