1406641217 has 4 divisors (see below), whose sum is σ = 1489384836. Its totient is φ = 1323897600.

The previous prime is 1406641163. The next prime is 1406641297. The reversal of 1406641217 is 7121466041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1221572401 + 185068816 = 34951^2 + 13604^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406641217 - 2³⁰ = 332899393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406641297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41371784 + ... + 41371817.

It is an arithmetic number, because the mean of its divisors is an integer number (372346209).

Almost surely, 2^1406641217 is an apocalyptic number.

1406641217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1406641217 is a deficient number, since it is larger than the sum of its proper divisors (82743619).

1406641217 is an equidigital number, since it uses as much as digits as its factorization.

1406641217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82743618.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1406641217 is about 37505.2158639302. The cubic root of 1406641217 is about 1120.4550704417.

The spelling of 1406641217 in words is "one billion, four hundred six million, six hundred forty-one thousand, two hundred seventeen".