1406287281 has 16 divisors (see below), whose sum is σ = 2146463744. Its totient is φ = 802261584.

The previous prime is 1406287237. The next prime is 1406287291. The reversal of 1406287281 is 1827826041.

It is a happy number.

It is not a de Polignac number, because 1406287281 - 2⁶ = 1406287217 is a prime.

It is a super-2 number, since 2×1406287281² = 3955287833404745922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1406287291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42415 + ... + 67908.

It is an arithmetic number, because the mean of its divisors is an integer number (134153984).

Almost surely, 2^1406287281 is an apocalyptic number.

It is an amenable number.

1406287281 is a deficient number, since it is larger than the sum of its proper divisors (740176463).

1406287281 is a wasteful number, since it uses less digits than its factorization.

1406287281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110940.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 1406287281 is about 37500.4970767055. The cubic root of 1406287281 is about 1120.3610870703.

The spelling of 1406287281 in words is "one billion, four hundred six million, two hundred eighty-seven thousand, two hundred eighty-one".