143572421 has 8 divisors (see below), whose sum is σ = 145229760. Its totient is φ = 141920352.

The previous prime is 143572369. The next prime is 143572427. The reversal of 143572421 is 124275341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 143572421 - 2¹⁴ = 143556037 is a prime.

It is a super-2 number, since 2×143572421² = 41226080143602482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143572427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82466 + ... + 84188.

It is an arithmetic number, because the mean of its divisors is an integer number (18153720).

Almost surely, 2^143572421 is an apocalyptic number.

It is an amenable number.

143572421 is a deficient number, since it is larger than the sum of its proper divisors (1657339).

143572421 is a wasteful number, since it uses less digits than its factorization.

143572421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635.

The product of its digits is 6720, while the sum is 29.

The square root of 143572421 is about 11982.1709635608. The cubic root of 143572421 is about 523.6289802658.

The spelling of 143572421 in words is "one hundred forty-three million, five hundred seventy-two thousand, four hundred twenty-one".