1111402005 has 64 divisors (see below), whose sum is σ = 2094770688. Its totient is φ = 492687360.

The previous prime is 1111402001. The next prime is 1111402087. The reversal of 1111402005 is 5002041111.

It is a happy number.

It is not a de Polignac number, because 1111402005 - 2² = 1111402001 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111402001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 466377 + ... + 468753.

It is an arithmetic number, because the mean of its divisors is an integer number (32730792).

Almost surely, 2^1111402005 is an apocalyptic number.

1111402005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1111402005 is a deficient number, since it is larger than the sum of its proper divisors (983368683).

1111402005 is a wasteful number, since it uses less digits than its factorization.

1111402005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526.

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

The square root of 1111402005 is about 33337.6964561141. The cubic root of 1111402005 is about 1035.8345482592.

Adding to 1111402005 its reverse (5002041111), we get a palindrome (6113443116).

The spelling of 1111402005 in words is "one billion, one hundred eleven million, four hundred two thousand, five".