1742121731 has 8 divisors (see below), whose sum is σ = 1998568704. Its totient is φ = 1487567880.

The previous prime is 1742121721. The next prime is 1742121751. The reversal of 1742121731 is 1371212471.

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

It is a cyclic number.

It is not a de Polignac number, because 1742121731 - 2¹⁴ = 1742105347 is a prime.

It is a super-2 number, since 2×1742121731² = 6069976251244872722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1742121694 and 1742121703.

It is not an unprimeable number, because it can be changed into a prime (1742121701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471305 + ... + 474986.

It is an arithmetic number, because the mean of its divisors is an integer number (249821088).

Almost surely, 2^1742121731 is an apocalyptic number.

1742121731 is a deficient number, since it is larger than the sum of its proper divisors (256446973).

1742121731 is an equidigital number, since it uses as much as digits as its factorization.

1742121731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946561.

The product of its digits is 2352, while the sum is 29.

The square root of 1742121731 is about 41738.7317847584. The cubic root of 1742121731 is about 1203.2600545629.

The spelling of 1742121731 in words is "one billion, seven hundred forty-two million, one hundred twenty-one thousand, seven hundred thirty-one".