1405400043123 has 16 divisors (see below), whose sum is σ = 2172599101440. Its totient is φ = 896197128552.

The previous prime is 1405400043097. The next prime is 1405400043167. The reversal of 1405400043123 is 3213400045041.

It is a happy number.

It is not a de Polignac number, because 1405400043123 - 2²⁹ = 1404863172211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1405400243123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1131561411 + ... + 1131562652.

It is an arithmetic number, because the mean of its divisors is an integer number (135787443840).

Almost surely, 2^{1405400043123} is an apocalyptic number.

1405400043123 is a deficient number, since it is larger than the sum of its proper divisors (767199058317).

1405400043123 is a wasteful number, since it uses less digits than its factorization.

1405400043123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263124095 (or 2263124089 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 1405400043123 its reverse (3213400045041), we get a palindrome (4618800088164).

The spelling of 1405400043123 in words is "one trillion, four hundred five billion, four hundred million, forty-three thousand, one hundred twenty-three".