1406255643 has 12 divisors (see below), whose sum is σ = 2187508960. Its totient is φ = 865388016.

The previous prime is 1406255639. The next prime is 1406255647. The reversal of 1406255643 is 3465526041.

1406255643 is a `hidden beast` number, since 1 + 4 + 0 + 6 + 2 + 5 + 5 + 643 = 666.

It is an interprime number because it is at equal distance from previous prime (1406255639) and next prime (1406255647).

It is not a de Polignac number, because 1406255643 - 2² = 1406255639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1406255598 and 1406255607.

It is not an unprimeable number, because it can be changed into a prime (1406255647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6009523 + ... + 6009756.

Almost surely, 2^1406255643 is an apocalyptic number.

1406255643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1406255643 is a deficient number, since it is larger than the sum of its proper divisors (781253317).

1406255643 is a wasteful number, since it uses less digits than its factorization.

1406255643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12019298 (or 12019295 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1406255643 is about 37500.0752399245. The cubic root of 1406255643 is about 1120.3526852190.

It can be divided in two parts, 1406 and 255643, that added together give a square (257049 = 507²).

The spelling of 1406255643 in words is "one billion, four hundred six million, two hundred fifty-five thousand, six hundred forty-three".