143525421 has 12 divisors (see below), whose sum is σ = 223261948. Its totient is φ = 88323264.

The previous prime is 143525419. The next prime is 143525429. The reversal of 143525421 is 124525341.

It can be written as a sum of positive squares in 2 ways, for example, as 69806025 + 73719396 = 8355^2 + 8586^2 .

It is not a de Polignac number, because 143525421 - 2¹ = 143525419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143525429) 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 11 ways as a sum of consecutive naturals, for example, 613240 + ... + 613473.

Almost surely, 2^143525421 is an apocalyptic number.

It is an amenable number.

143525421 is a deficient number, since it is larger than the sum of its proper divisors (79736527).

143525421 is a wasteful number, since it uses less digits than its factorization.

143525421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226732 (or 1226729 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 143525421 is about 11980.2095557632. The cubic root of 143525421 is about 523.5718354746.

The spelling of 143525421 in words is "one hundred forty-three million, five hundred twenty-five thousand, four hundred twenty-one".