403145123 has 4 divisors (see below), whose sum is σ = 426859560. Its totient is φ = 379430688.

The previous prime is 403145107. The next prime is 403145131. The reversal of 403145123 is 321541304.

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 403145123 - 2⁴ = 403145107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403145023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11857193 + ... + 11857226.

It is an arithmetic number, because the mean of its divisors is an integer number (106714890).

Almost surely, 2^403145123 is an apocalyptic number.

403145123 is a deficient number, since it is larger than the sum of its proper divisors (23714437).

403145123 is a wasteful number, since it uses less digits than its factorization.

403145123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23714436.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 403145123 is about 20078.4741203110. The cubic root of 403145123 is about 738.7323824082.

Adding to 403145123 its reverse (321541304), we get a palindrome (724686427).

The spelling of 403145123 in words is "four hundred three million, one hundred forty-five thousand, one hundred twenty-three".