840223425 has 24 divisors (see below), whose sum is σ = 1412722080. Its totient is φ = 440521600.

The previous prime is 840223421. The next prime is 840223429. The reversal of 840223425 is 524322048.

It is an interprime number because it is at equal distance from previous prime (840223421) and next prime (840223429).

It is not a de Polignac number, because 840223425 - 2² = 840223421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 840223392 and 840223401.

It is not an unprimeable number, because it can be changed into a prime (840223421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90516 + ... + 99365.

It is an arithmetic number, because the mean of its divisors is an integer number (58863420).

Almost surely, 2^840223425 is an apocalyptic number.

It is an amenable number.

840223425 is a deficient number, since it is larger than the sum of its proper divisors (572498655).

840223425 is a wasteful number, since it uses less digits than its factorization.

840223425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189953 (or 189948 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 840223425 is about 28986.6076835493. The cubic root of 840223425 is about 943.6224434711.

The spelling of 840223425 in words is "eight hundred forty million, two hundred twenty-three thousand, four hundred twenty-five".