144142474921 has 27 divisors (see below), whose sum is σ = 160232076823. Its totient is φ = 129631451840.

The previous prime is 144142474909. The next prime is 144142474933. The reversal of 144142474921 is 129474241441.

The square root of 144142474921 is 379661.

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

It is an interprime number because it is at equal distance from previous prime (144142474909) and next prime (144142474933).

It can be written as a sum of positive squares in only one way, i.e., 112221650025 + 31920824896 = 334995^2 + 178664^2 .

It is not a de Polignac number, because 144142474921 - 2¹³ = 144142466729 is a prime.

It is a super-2 number, since 2×144142474921² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144142474951) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 148446966 + ... + 148447936.

Almost surely, 2^144142474921 is an apocalyptic number.

144142474921 is the 379661-st square number.

144142474921 is the 189831-st centered octagonal number.

It is an amenable number.

144142474921 is a deficient number, since it is larger than the sum of its proper divisors (16089601902).

144142474921 is an frugal number, since it uses more digits than its factorization.

144142474921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022 (or 1011 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The spelling of 144142474921 in words is "one hundred forty-four billion, one hundred forty-two million, four hundred seventy-four thousand, nine hundred twenty-one".