143420425 has 12 divisors (see below), whose sum is σ = 178265500. Its totient is φ = 114462720.

The previous prime is 143420383. The next prime is 143420429. The reversal of 143420425 is 524024341.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 31674384 + 111746041 = 5628^2 + 10571^2 .

It is not a de Polignac number, because 143420425 - 2²³ = 135031817 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 143420425.

It is not an unprimeable number, because it can be changed into a prime (143420429) 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, 4201 + ... + 17449.

Almost surely, 2^143420425 is an apocalyptic number.

It is an amenable number.

143420425 is a deficient number, since it is larger than the sum of its proper divisors (34845075).

143420425 is a wasteful number, since it uses less digits than its factorization.

143420425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13692 (or 13687 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 143420425 is about 11975.8266938028. The cubic root of 143420425 is about 523.4441313632. Note that the first 3 decimals are identical.

Adding to 143420425 its reverse (524024341), we get a palindrome (667444766).

The spelling of 143420425 in words is "one hundred forty-three million, four hundred twenty thousand, four hundred twenty-five".