1421305388 has 12 divisors (see below), whose sum is σ = 2487886800. Its totient is φ = 710480592.

The previous prime is 1421305373. The next prime is 1421305411. The reversal of 1421305388 is 8835031241.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23456 + ... + 58247.

It is an arithmetic number, because the mean of its divisors is an integer number (207323900).

Almost surely, 2^1421305388 is an apocalyptic number.

It is an amenable number.

1421305388 is a deficient number, since it is larger than the sum of its proper divisors (1066581412).

1421305388 is a wasteful number, since it uses less digits than its factorization.

With its successor (1421305389) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (86054).

With its successor (1421305389) it forms an eRAP, since the sums of their prime factors are consecutive (86056 and 86057).

1421305388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86056 (or 86054 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1421305388 is about 37700.2040843282. The cubic root of 1421305388 is about 1124.3351826447.

The spelling of 1421305388 in words is "one billion, four hundred twenty-one million, three hundred five thousand, three hundred eighty-eight".