1671742742 has 4 divisors (see below), whose sum is σ = 2507614116. Its totient is φ = 835871370.

The previous prime is 1671742727. The next prime is 1671742747. The reversal of 1671742742 is 2472471761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2472471761 = 2141 ⋅1154821.

It is a super-4 number, since 4×1671742742⁴ (a number of 38 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1671742742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671742747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417935684 + ... + 417935687.

It is an arithmetic number, because the mean of its divisors is an integer number (626903529).

Almost surely, 2^1671742742 is an apocalyptic number.

1671742742 is a deficient number, since it is larger than the sum of its proper divisors (835871374).

1671742742 is an equidigital number, since it uses as much as digits as its factorization.

1671742742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835871373.

The product of its digits is 131712, while the sum is 41.

The square root of 1671742742 is about 40886.9507544889. The cubic root of 1671742742 is about 1186.8335521334.

The spelling of 1671742742 in words is "one billion, six hundred seventy-one million, seven hundred forty-two thousand, seven hundred forty-two".