740139 has 4 divisors (see below), whose sum is σ = 986856. Its totient is φ = 493424.

The previous prime is 740123. The next prime is 740141. The reversal of 740139 is 931047.

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 740139 - 2⁴ = 740123 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (740189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123354 + ... + 123359.

It is an arithmetic number, because the mean of its divisors is an integer number (246714).

2⁷⁴⁰¹³⁹ is an apocalyptic number.

740139 is a deficient number, since it is larger than the sum of its proper divisors (246717).

740139 is a wasteful number, since it uses less digits than its factorization.

740139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246716.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 740139 is about 860.3133150196. The cubic root of 740139 is about 90.4560799475.

The spelling of 740139 in words is "seven hundred forty thousand, one hundred thirty-nine".