725043123 has 32 divisors (see below), whose sum is σ = 1269926400. Its totient is φ = 400020768.

The previous prime is 725043107. The next prime is 725043161. The reversal of 725043123 is 321340527.

It is not a de Polignac number, because 725043123 - 2⁴ = 725043107 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 (725043023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60661 + ... + 71622.

It is an arithmetic number, because the mean of its divisors is an integer number (39685200).

Almost surely, 2^725043123 is an apocalyptic number.

725043123 is a deficient number, since it is larger than the sum of its proper divisors (544883277).

725043123 is a wasteful number, since it uses less digits than its factorization.

725043123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132328 (or 132322 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 725043123 is about 26926.6247977722. The cubic root of 725043123 is about 898.3687005220.

The spelling of 725043123 in words is "seven hundred twenty-five million, forty-three thousand, one hundred twenty-three".