1749042538 has 4 divisors (see below), whose sum is σ = 2623563810. Its totient is φ = 874521268.

The previous prime is 1749042527. The next prime is 1749042557. The reversal of 1749042538 is 8352409471.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8352409471 = 7 ⋅1193201353.

It can be written as a sum of positive squares in only one way, i.e., 1583482849 + 165559689 = 39793^2 + 12867^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1749042494 and 1749042503.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 437260633 + ... + 437260636.

Almost surely, 2^1749042538 is an apocalyptic number.

1749042538 is a deficient number, since it is larger than the sum of its proper divisors (874521272).

1749042538 is an equidigital number, since it uses as much as digits as its factorization.

1749042538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874521271.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 1749042538 is about 41821.5559012335. Note that the first 3 decimals coincide. The cubic root of 1749042538 is about 1204.8513186962.

The spelling of 1749042538 in words is "one billion, seven hundred forty-nine million, forty-two thousand, five hundred thirty-eight".