1421956025851 has 16 divisors (see below), whose sum is σ = 1532699320320. Its totient is φ = 1315349782560.

The previous prime is 1421956025801. The next prime is 1421956025873. The reversal of 1421956025851 is 1585206591241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421956025851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421956025795 and 1421956025804.

It is not an unprimeable number, because it can be changed into a prime (1421956025801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349710 + ... + 1722268.

It is an arithmetic number, because the mean of its divisors is an integer number (95793707520).

Almost surely, 2^{1421956025851} is an apocalyptic number.

1421956025851 is a deficient number, since it is larger than the sum of its proper divisors (110743294469).

1421956025851 is a wasteful number, since it uses less digits than its factorization.

1421956025851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374066.

The product of its (nonzero) digits is 864000, while the sum is 49.

The spelling of 1421956025851 in words is "one trillion, four hundred twenty-one billion, nine hundred fifty-six million, twenty-five thousand, eight hundred fifty-one".