144278587 has 4 divisors (see below), whose sum is σ = 146255080. Its totient is φ = 142302096.

The previous prime is 144278489. The next prime is 144278591. The reversal of 144278587 is 785872441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144278587 - 2²³ = 135889979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144278987) 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, 988137 + ... + 988282.

It is an arithmetic number, because the mean of its divisors is an integer number (36563770).

Almost surely, 2^144278587 is an apocalyptic number.

144278587 is a deficient number, since it is larger than the sum of its proper divisors (1976493).

144278587 is an equidigital number, since it uses as much as digits as its factorization.

144278587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976492.

The product of its digits is 501760, while the sum is 46.

The square root of 144278587 is about 12011.6021828897. The cubic root of 144278587 is about 524.4860724345.

The spelling of 144278587 in words is "one hundred forty-four million, two hundred seventy-eight thousand, five hundred eighty-seven".