1442739 has 8 divisors (see below), whose sum is σ = 2036880. Its totient is φ = 905216.

The previous prime is 1442731. The next prime is 1442743. The reversal of 1442739 is 9372441.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1442739 - 2³ = 1442731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1442731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14094 + ... + 14195.

It is an arithmetic number, because the mean of its divisors is an integer number (254610).

2^1442739 is an apocalyptic number.

1442739 is a deficient number, since it is larger than the sum of its proper divisors (594141).

1442739 is a wasteful number, since it uses less digits than its factorization.

1442739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28309.

The product of its digits is 6048, while the sum is 30.

The square root of 1442739 is about 1201.1407078274. The cubic root of 1442739 is about 112.9958752769.

The spelling of 1442739 in words is "one million, four hundred forty-two thousand, seven hundred thirty-nine".