1742991 has 4 divisors (see below), whose sum is σ = 2323992. Its totient is φ = 1161992.

The previous prime is 1742989. The next prime is 1742999. The reversal of 1742991 is 1992471.

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 1742991 - 2¹ = 1742989 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1742999) 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, 290496 + ... + 290501.

It is an arithmetic number, because the mean of its divisors is an integer number (580998).

2^1742991 is an apocalyptic number.

1742991 is a deficient number, since it is larger than the sum of its proper divisors (581001).

1742991 is an equidigital number, since it uses as much as digits as its factorization.

1742991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581000.

The product of its digits is 4536, while the sum is 33.

The square root of 1742991 is about 1320.2238446567. The cubic root of 1742991 is about 120.3460152089.

The spelling of 1742991 in words is "one million, seven hundred forty-two thousand, nine hundred ninety-one".