842425 has 12 divisors (see below), whose sum is σ = 1079296. Its totient is φ = 651600.

The previous prime is 842423. The next prime is 842447. The reversal of 842425 is 524248.

842425 = T₁₅₈ + T₁₅₉ + ... + T₂₀₇.

It is a happy number.

It is not a de Polignac number, because 842425 - 2¹ = 842423 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

842425 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 842425.

It is not an unprimeable number, because it can be changed into a prime (842423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232 + ... + 1318.

2⁸⁴²⁴²⁵ is an apocalyptic number.

It is an amenable number.

842425 is a deficient number, since it is larger than the sum of its proper divisors (236871).

842425 is a wasteful number, since it uses less digits than its factorization.

842425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128 (or 1123 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The square root of 842425 is about 917.8371315217. The cubic root of 842425 is about 94.4445892603. Note that the first 3 decimals are identical.

The spelling of 842425 in words is "eight hundred forty-two thousand, four hundred twenty-five".