1406643405 has 16 divisors (see below), whose sum is σ = 2328238080. Its totient is φ = 724340288.

The previous prime is 1406643389. The next prime is 1406643421. The reversal of 1406643405 is 5043466041.

It is an interprime number because it is at equal distance from previous prime (1406643389) and next prime (1406643421).

It is a cyclic number.

It is not a de Polignac number, because 1406643405 - 2⁴ = 1406643389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1616397 + ... + 1617266.

It is an arithmetic number, because the mean of its divisors is an integer number (145514880).

Almost surely, 2^1406643405 is an apocalyptic number.

1406643405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1406643405 is a deficient number, since it is larger than the sum of its proper divisors (921594675).

1406643405 is a wasteful number, since it uses less digits than its factorization.

1406643405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233700.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1406643405 is about 37505.2450331950. The cubic root of 1406643405 is about 1120.4556513893.

The spelling of 1406643405 in words is "one billion, four hundred six million, six hundred forty-three thousand, four hundred five".