142405445421 has 12 divisors (see below), whose sum is σ = 205700098240. Its totient is φ = 94935420360.

The previous prime is 142405445407. The next prime is 142405445431. The reversal of 142405445421 is 124544504241.

142405445421 is a `hidden beast` number, since 1 + 4 + 2 + 40 + 544 + 54 + 21 = 666.

It is not a de Polignac number, because 142405445421 - 2⁵ = 142405445389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142405445431) 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, 838866 + ... + 994236.

Almost surely, 2^142405445421 is an apocalyptic number.

It is an amenable number.

142405445421 is a deficient number, since it is larger than the sum of its proper divisors (63294652819).

142405445421 is a wasteful number, since it uses less digits than its factorization.

142405445421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257216 (or 257213 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 36.

Adding to 142405445421 its reverse (124544504241), we get a palindrome (266949949662).

The spelling of 142405445421 in words is "one hundred forty-two billion, four hundred five million, four hundred forty-five thousand, four hundred twenty-one".