143402225 has 24 divisors (see below), whose sum is σ = 188927640. Its totient is φ = 107601920.

The previous prime is 143402221. The next prime is 143402243. The reversal of 143402225 is 522204341.

143402225 = 165² + 166² + ... + 757².

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 34492129 + 108910096 = 5873^2 + 10436^2 .

It is not a de Polignac number, because 143402225 - 2² = 143402221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 143402225.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143402221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241529 + ... + 242121.

It is an arithmetic number, because the mean of its divisors is an integer number (7871985).

Almost surely, 2^143402225 is an apocalyptic number.

It is an amenable number.

143402225 is a deficient number, since it is larger than the sum of its proper divisors (45525415).

143402225 is a wasteful number, since it uses less digits than its factorization.

143402225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 143402225 is about 11975.0668056592. The cubic root of 143402225 is about 523.4219888030.

Adding to 143402225 its reverse (522204341), we get a palindrome (665606566).

It can be divided in two parts, 143 and 402225, that multiplied together give a triangular number (57518175 = T₁₀₇₂₅).

The spelling of 143402225 in words is "one hundred forty-three million, four hundred two thousand, two hundred twenty-five".