11281402 has 32 divisors (see below), whose sum is σ = 19673280. Its totient is φ = 4798080.

The previous prime is 11281399. The next prime is 11281409. The reversal of 11281402 is 20418211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 11281402.

It is not an unprimeable number, because it can be changed into a prime (11281409) 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, 57168 + ... + 57364.

It is an arithmetic number, because the mean of its divisors is an integer number (614790).

Almost surely, 2^11281402 is an apocalyptic number.

11281402 is a deficient number, since it is larger than the sum of its proper divisors (8391878).

11281402 is a wasteful number, since it uses less digits than its factorization.

11281402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 11281402 is about 3358.7798379769. The cubic root of 11281402 is about 224.2785252386.

Adding to 11281402 its reverse (20418211), we get a palindrome (31699613).

The spelling of 11281402 in words is "eleven million, two hundred eighty-one thousand, four hundred two".