1420171961 has 16 divisors (see below), whose sum is σ = 1597518720. Its totient is φ = 1252669440.

The previous prime is 1420171957. The next prime is 1420171997. The reversal of 1420171961 is 1691710241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1420171961 - 2² = 1420171957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1420171901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419606 + ... + 422976.

It is an arithmetic number, because the mean of its divisors is an integer number (99844920).

Almost surely, 2^1420171961 is an apocalyptic number.

It is an amenable number.

1420171961 is a deficient number, since it is larger than the sum of its proper divisors (177346759).

1420171961 is a wasteful number, since it uses less digits than its factorization.

1420171961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4816.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1420171961 is about 37685.1689793213. The cubic root of 1420171961 is about 1124.0362342836.

The spelling of 1420171961 in words is "one billion, four hundred twenty million, one hundred seventy-one thousand, nine hundred sixty-one".