1142739 has 12 divisors (see below), whose sum is σ = 1777776. Its totient is φ = 703152.

The previous prime is 1142737. The next prime is 1142759. The reversal of 1142739 is 9372411.

It is not a de Polignac number, because 1142739 - 2¹ = 1142737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1142737) 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 11 ways as a sum of consecutive naturals, for example, 4767 + ... + 5000.

It is an arithmetic number, because the mean of its divisors is an integer number (148148).

2^1142739 is an apocalyptic number.

1142739 is a deficient number, since it is larger than the sum of its proper divisors (635037).

1142739 is a wasteful number, since it uses less digits than its factorization.

1142739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9786 (or 9783 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1142739 is about 1068.9897099598. The cubic root of 1142739 is about 104.5479889172.

It can be divided in two parts, 1142 and 739, that added together give a palindrome (1881).

The spelling of 1142739 in words is "one million, one hundred forty-two thousand, seven hundred thirty-nine".