1427135021 has 4 divisors (see below), whose sum is σ = 1536914652. Its totient is φ = 1317355392.

The previous prime is 1427134999. The next prime is 1427135069. The reversal of 1427135021 is 1205317241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 746655625 + 680479396 = 27325^2 + 26086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1427135021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427138021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 54889796 + ... + 54889821.

It is an arithmetic number, because the mean of its divisors is an integer number (384228663).

Almost surely, 2^1427135021 is an apocalyptic number.

It is an amenable number.

1427135021 is a deficient number, since it is larger than the sum of its proper divisors (109779631).

1427135021 is a wasteful number, since it uses less digits than its factorization.

1427135021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109779630.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1427135021 is about 37777.4406359139. The cubic root of 1427135021 is about 1125.8702786283.

The spelling of 1427135021 in words is "one billion, four hundred twenty-seven million, one hundred thirty-five thousand, twenty-one".