11421015 has 16 divisors (see below), whose sum is σ = 18699648. Its totient is φ = 5949216.

The previous prime is 11420971. The next prime is 11421017. The reversal of 11421015 is 51012411.

It is a happy number.

It is not a de Polignac number, because 11421015 - 2⁹ = 11420503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 11420985 and 11421003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421017) 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 15 ways as a sum of consecutive naturals, for example, 8209 + ... + 9498.

It is an arithmetic number, because the mean of its divisors is an integer number (1168728).

Almost surely, 2^11421015 is an apocalyptic number.

11421015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11421015 is a deficient number, since it is larger than the sum of its proper divisors (7278633).

11421015 is a wasteful number, since it uses less digits than its factorization.

11421015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17758.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 11421015 is about 3379.4992232578. The cubic root of 11421015 is about 225.1999210753.

Adding to 11421015 its reverse (51012411), we get a palindrome (62433426).

The spelling of 11421015 in words is "eleven million, four hundred twenty-one thousand, fifteen".