1106451721 has 8 divisors (see below), whose sum is σ = 1161504000. Its totient is φ = 1052609520.

The previous prime is 1106451701. The next prime is 1106451739. The reversal of 1106451721 is 1271546011.

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

It is a cyclic number.

It is not a de Polignac number, because 1106451721 - 2⁹ = 1106451209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1106451721.

It is not an unprimeable number, because it can be changed into a prime (1106451701) 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, 300646 + ... + 304303.

It is an arithmetic number, because the mean of its divisors is an integer number (145188000).

Almost surely, 2^1106451721 is an apocalyptic number.

It is an amenable number.

1106451721 is a deficient number, since it is larger than the sum of its proper divisors (55052279).

1106451721 is an equidigital number, since it uses as much as digits as its factorization.

1106451721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605039.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1106451721 is about 33263.3690566665. The cubic root of 1106451721 is about 1034.2943593495.

Adding to 1106451721 its reverse (1271546011), we get a palindrome (2377997732).

The spelling of 1106451721 in words is "one billion, one hundred six million, four hundred fifty-one thousand, seven hundred twenty-one".