1421340138 has 36 divisors (see below), whose sum is σ = 3131030214. Its totient is φ = 465991200.

The previous prime is 1421340121. The next prime is 1421340143. The reversal of 1421340138 is 8310431241.

1421340138 is a `hidden beast` number, since 14 + 213 + 401 + 38 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 830995929 + 590344209 = 28827^2 + 24297^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 56368 + ... + 77588.

Almost surely, 2^1421340138 is an apocalyptic number.

1421340138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1421340138 is an abundant number, since it is smaller than the sum of its proper divisors (1709690076).

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

1421340138 is a wasteful number, since it uses less digits than its factorization.

1421340138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21351 (or 21287 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1421340138 is about 37700.6649543480. The cubic root of 1421340138 is about 1124.3443456601.

Adding to 1421340138 its reverse (8310431241), we get a palindrome (9731771379).

The spelling of 1421340138 in words is "one billion, four hundred twenty-one million, three hundred forty thousand, one hundred thirty-eight".