144742191 has 16 divisors (see below), whose sum is σ = 212623488. Its totient is φ = 86852000.

The previous prime is 144742189. The next prime is 144742253. The reversal of 144742191 is 191247441.

It is a cyclic number.

It is not a de Polignac number, because 144742191 - 2¹ = 144742189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144742111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18381 + ... + 25046.

It is an arithmetic number, because the mean of its divisors is an integer number (13288968).

Almost surely, 2^144742191 is an apocalyptic number.

144742191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

144742191 is a deficient number, since it is larger than the sum of its proper divisors (67881297).

144742191 is a wasteful number, since it uses less digits than its factorization.

144742191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43542.

The product of its digits is 8064, while the sum is 33.

The square root of 144742191 is about 12030.8848801740. The cubic root of 144742191 is about 525.0472411004.

The spelling of 144742191 in words is "one hundred forty-four million, seven hundred forty-two thousand, one hundred ninety-one".