840725945 has 8 divisors (see below), whose sum is σ = 1011683520. Its totient is φ = 670705840.

The previous prime is 840725917. The next prime is 840725953. The reversal of 840725945 is 549527048.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 840725945 - 2⁶ = 840725881 is a prime.

It is a super-2 number, since 2×840725945² = 1413640229192286050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 840725896 and 840725905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232391 + ... + 235980.

It is an arithmetic number, because the mean of its divisors is an integer number (126460440).

Almost surely, 2^840725945 is an apocalyptic number.

It is an amenable number.

840725945 is a deficient number, since it is larger than the sum of its proper divisors (170957575).

840725945 is a wasteful number, since it uses less digits than its factorization.

840725945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468735.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 840725945 is about 28995.2745287918. The cubic root of 840725945 is about 943.8105262411.

The spelling of 840725945 in words is "eight hundred forty million, seven hundred twenty-five thousand, nine hundred forty-five".