1742399 has 4 divisors (see below), whose sum is σ = 1745040. Its totient is φ = 1739760.

The previous prime is 1742393. The next prime is 1742401. The reversal of 1742399 is 9932471.

It is a Cunningham number, because it is equal to 1320²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1742399 - 2⁴ = 1742383 is a prime.

It is a super-4 number, since 4×1742399⁴ (a number of 26 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1742393) 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 3 ways as a sum of consecutive naturals, for example, 659 + ... + 1979.

It is an arithmetic number, because the mean of its divisors is an integer number (436260).

2^1742399 is an apocalyptic number.

1742399 is a deficient number, since it is larger than the sum of its proper divisors (2641).

1742399 is a wasteful number, since it uses less digits than its factorization.

1742399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640.

The product of its digits is 13608, while the sum is 35.

The square root of 1742399 is about 1319.9996212121. Note that the first 3 decimals coincide. The cubic root of 1742399 is about 120.3323886500.

The spelling of 1742399 in words is "one million, seven hundred forty-two thousand, three hundred ninety-nine".