1402543123 has 4 divisors (see below), whose sum is σ = 1403142048. Its totient is φ = 1401944200.

The previous prime is 1402543111. The next prime is 1402543139. The reversal of 1402543123 is 3213452041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1402543123 - 2²¹ = 1400445971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1402543183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295936 + ... + 300637.

It is an arithmetic number, because the mean of its divisors is an integer number (350785512).

Almost surely, 2^1402543123 is an apocalyptic number.

1402543123 is a deficient number, since it is larger than the sum of its proper divisors (598925).

1402543123 is an equidigital number, since it uses as much as digits as its factorization.

1402543123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598924.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1402543123 is about 37450.5423592236. The cubic root of 1402543123 is about 1119.3659046228.

Adding to 1402543123 its reverse (3213452041), we get a palindrome (4615995164).

The spelling of 1402543123 in words is "one billion, four hundred two million, five hundred forty-three thousand, one hundred twenty-three".