42424425 has 24 divisors (see below), whose sum is σ = 77936480. Its totient is φ = 22626000.

The previous prime is 42424423. The next prime is 42424429. The reversal of 42424425 is 52442424.

It is not a de Polignac number, because 42424425 - 2¹ = 42424423 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 (42424423) 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, 30751 + ... + 32100.

Almost surely, 2^42424425 is an apocalyptic number.

42424425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42424425 is a deficient number, since it is larger than the sum of its proper divisors (35512055).

42424425 is a wasteful number, since it uses less digits than its factorization.

42424425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62870 (or 62859 counting only the distinct ones).

The product of its digits is 10240, while the sum is 27.

The square root of 42424425 is about 6513.4034881926. The cubic root of 42424425 is about 348.7696254420.

Adding to 42424425 its reverse (52442424), we get a palindrome (94866849).

It can be divided in two parts, 42424 and 425, that added together give a square (42849 = 207²).

The spelling of 42424425 in words is "forty-two million, four hundred twenty-four thousand, four hundred twenty-five".