1661461342 has 4 divisors (see below), whose sum is σ = 2492192016. Its totient is φ = 830730670.

The previous prime is 1661461339. The next prime is 1661461349. The reversal of 1661461342 is 2431641661.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1661461298 and 1661461307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661461349) 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 as a sum of consecutive naturals, namely, 415365334 + ... + 415365337.

It is an arithmetic number, because the mean of its divisors is an integer number (623048004).

Almost surely, 2^1661461342 is an apocalyptic number.

1661461342 is a deficient number, since it is larger than the sum of its proper divisors (830730674).

1661461342 is an equidigital number, since it uses as much as digits as its factorization.

1661461342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830730673.

The product of its digits is 20736, while the sum is 34.

The square root of 1661461342 is about 40761.0272441704. The cubic root of 1661461342 is about 1184.3954952926.

The spelling of 1661461342 in words is "one billion, six hundred sixty-one million, four hundred sixty-one thousand, three hundred forty-two".