1421907636 has 24 divisors (see below), whose sum is σ = 3492405280. Its totient is φ = 449023392.

The previous prime is 1421907623. The next prime is 1421907661. The reversal of 1421907636 is 6367091241.

It is a junction number, because it is equal to n+sod(n) for n = 1421907594 and 1421907603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3117991 + ... + 3118446.

Almost surely, 2^1421907636 is an apocalyptic number.

It is an amenable number.

1421907636 is an abundant number, since it is smaller than the sum of its proper divisors (2070497644).

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

1421907636 is a wasteful number, since it uses less digits than its factorization.

1421907636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236463 (or 6236461 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 1421907636 is about 37708.1905691588. The cubic root of 1421907636 is about 1124.4939646123.

Adding to 1421907636 its reverse (6367091241), we get a palindrome (7788998877).

The spelling of 1421907636 in words is "one billion, four hundred twenty-one million, nine hundred seven thousand, six hundred thirty-six".