1421261172 has 36 divisors (see below), whose sum is σ = 3748836000. Its totient is φ = 453155472.

The previous prime is 1421261159. The next prime is 1421261201. The reversal of 1421261172 is 2711621241.

1421261172 is a `hidden beast` number, since 1 + 42 + 1 + 2 + 611 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 857422 + ... + 859077.

Almost surely, 2^1421261172 is an apocalyptic number.

1421261172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1421261172 is an abundant number, since it is smaller than the sum of its proper divisors (2327574828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421261172 is a wasteful number, since it uses less digits than its factorization.

1421261172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716532 (or 1716527 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1421261172 is about 37699.6176638438. The cubic root of 1421261172 is about 1124.3235233817.

The spelling of 1421261172 in words is "one billion, four hundred twenty-one million, two hundred sixty-one thousand, one hundred seventy-two".