1401406281 has 24 divisors (see below), whose sum is σ = 2262143520. Its totient is φ = 828619200.

The previous prime is 1401406277. The next prime is 1401406301. The reversal of 1401406281 is 1826041041.

It is a happy number.

It is not a de Polignac number, because 1401406281 - 2² = 1401406277 is a prime.

It is a super-2 number, since 2×1401406281² = 3927879128852501922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1401406211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168571 + ... + 176688.

It is an arithmetic number, because the mean of its divisors is an integer number (94255980).

Almost surely, 2^1401406281 is an apocalyptic number.

1401406281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1401406281 is a deficient number, since it is larger than the sum of its proper divisors (860737239).

1401406281 is a wasteful number, since it uses less digits than its factorization.

1401406281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345317 (or 345314 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1401406281 is about 37435.3613713024. The cubic root of 1401406281 is about 1119.0633860215.

The spelling of 1401406281 in words is "one billion, four hundred one million, four hundred six thousand, two hundred eighty-one".