142021198449 has 45 divisors (see below), whose sum is σ = 229801449009. Its totient is φ = 87370526880.

The previous prime is 142021198441. The next prime is 142021198457. The reversal of 142021198449 is 944891120241.

The square root of 142021198449 is 376857.

It is a perfect power (a square), and thus also a powerful number.

142021198449 is a `hidden beast` number, since 1 + 420 + 211 + 9 + 8 + 4 + 4 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (142021198441) and next prime (142021198457).

It can be written as a sum of positive squares in 4 ways, for example, as 1522170225 + 140499028224 = 39015^2 + 374832^2 .

It is not a de Polignac number, because 142021198449 - 2³ = 142021198441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142021198441) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 44090659 + ... + 44093879.

Almost surely, 2^142021198449 is an apocalyptic number.

142021198449 is the 376857-th square number.

142021198449 is the 188429-th centered octagonal number.

It is an amenable number.

142021198449 is a deficient number, since it is larger than the sum of its proper divisors (87780250560).

142021198449 is an frugal number, since it uses more digits than its factorization.

142021198449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480 (or 3237 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 142021198449 in words is "one hundred forty-two billion, twenty-one million, one hundred ninety-eight thousand, four hundred forty-nine".