1634421105 has 16 divisors (see below), whose sum is σ = 2905637760. Its totient is φ = 871691184.

The previous prime is 1634421083. The next prime is 1634421109. The reversal of 1634421105 is 5011244361.

It is a happy number.

1634421105 is a `hidden beast` number, since 1 + 634 + 4 + 21 + 1 + 0 + 5 = 666.

It is not a de Polignac number, because 1634421105 - 2⁵ = 1634421073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1634421109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6053277 + ... + 6053546.

It is an arithmetic number, because the mean of its divisors is an integer number (181602360).

Almost surely, 2^1634421105 is an apocalyptic number.

1634421105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1634421105 is a deficient number, since it is larger than the sum of its proper divisors (1271216655).

1634421105 is a wasteful number, since it uses less digits than its factorization.

1634421105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12106837 (or 12106831 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1634421105 is about 40427.9742876143. The cubic root of 1634421105 is about 1177.9349847329.

Adding to 1634421105 its reverse (5011244361), we get a palindrome (6645665466).

The spelling of 1634421105 in words is "one billion, six hundred thirty-four million, four hundred twenty-one thousand, one hundred five".