142221463 has 4 divisors (see below), whose sum is σ = 142344088. Its totient is φ = 142098840.

The previous prime is 142221379. The next prime is 142221493. The reversal of 142221463 is 364122241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364122241 = 7 ⋅52017463.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142221463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142221493) 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, 59556 + ... + 61897.

It is an arithmetic number, because the mean of its divisors is an integer number (35586022).

Almost surely, 2^142221463 is an apocalyptic number.

142221463 is a deficient number, since it is larger than the sum of its proper divisors (122625).

142221463 is a wasteful number, since it uses less digits than its factorization.

142221463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122624.

The product of its digits is 2304, while the sum is 25.

The square root of 142221463 is about 11925.6640485970. The cubic root of 142221463 is about 521.9814233247.

The spelling of 142221463 in words is "one hundred forty-two million, two hundred twenty-one thousand, four hundred sixty-three".