143245662421 has 4 divisors (see below), whose sum is σ = 144194309344. Its totient is φ = 142297015500.

The previous prime is 143245662419. The next prime is 143245662431. The reversal of 143245662421 is 124266542341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124266542341 = 4259 ⋅29177399.

It is a cyclic number.

It is not a de Polignac number, because 143245662421 - 2¹ = 143245662419 is a prime.

It is a super-3 number, since 3×143245662421³ (a number of 34 digits) contains 333 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 (143245662431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474323235 + ... + 474323536.

It is an arithmetic number, because the mean of its divisors is an integer number (36048577336).

Almost surely, 2^143245662421 is an apocalyptic number.

It is an amenable number.

143245662421 is a deficient number, since it is larger than the sum of its proper divisors (948646923).

143245662421 is an equidigital number, since it uses as much as digits as its factorization.

143245662421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948646922.

The product of its digits is 276480, while the sum is 40.

The spelling of 143245662421 in words is "one hundred forty-three billion, two hundred forty-five million, six hundred sixty-two thousand, four hundred twenty-one".