1401264243 has 6 divisors (see below), whose sum is σ = 2024048364. Its totient is φ = 934176156.

The previous prime is 1401264233. The next prime is 1401264247. The reversal of 1401264243 is 3424621041.

It is a happy number.

1401264243 is a `hidden beast` number, since 1 + 4 + 0 + 12 + 642 + 4 + 3 = 666.

It is not a de Polignac number, because 1401264243 - 2⁸ = 1401263987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1401264247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77848005 + ... + 77848022.

It is an arithmetic number, because the mean of its divisors is an integer number (337341394).

Almost surely, 2^1401264243 is an apocalyptic number.

1401264243 is a deficient number, since it is larger than the sum of its proper divisors (622784121).

1401264243 is a wasteful number, since it uses less digits than its factorization.

1401264243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155696033 (or 155696030 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1401264243 is about 37433.4642131876. The cubic root of 1401264243 is about 1119.0255775958.

Adding to 1401264243 its reverse (3424621041), we get a palindrome (4825885284).

The spelling of 1401264243 in words is "one billion, four hundred one million, two hundred sixty-four thousand, two hundred forty-three".