725909145 has 16 divisors (see below), whose sum is σ = 1250797632. Its totient is φ = 357370560.

The previous prime is 725909137. The next prime is 725909189. The reversal of 725909145 is 541909527.

It is not a de Polignac number, because 725909145 - 2³ = 725909137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 725909097 and 725909106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1861111 + ... + 1861500.

It is an arithmetic number, because the mean of its divisors is an integer number (78174852).

Almost surely, 2^725909145 is an apocalyptic number.

It is an amenable number.

725909145 is a deficient number, since it is larger than the sum of its proper divisors (524888487).

725909145 is a wasteful number, since it uses less digits than its factorization.

725909145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722632.

The product of its (nonzero) digits is 113400, while the sum is 42.

The square root of 725909145 is about 26942.7011452081. The cubic root of 725909145 is about 898.7262413257.

The spelling of 725909145 in words is "seven hundred twenty-five million, nine hundred nine thousand, one hundred forty-five".