1021386057 has 4 divisors (see below), whose sum is σ = 1361848080. Its totient is φ = 680924036.

The previous prime is 1021385971. The next prime is 1021386083. The reversal of 1021386057 is 7506831201.

1021386057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021386057 - 2²³ = 1012997449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021386557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170231007 + ... + 170231012.

It is an arithmetic number, because the mean of its divisors is an integer number (340462020).

Almost surely, 2^1021386057 is an apocalyptic number.

It is an amenable number.

1021386057 is a deficient number, since it is larger than the sum of its proper divisors (340462023).

1021386057 is an equidigital number, since it uses as much as digits as its factorization.

1021386057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340462022.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1021386057 is about 31959.1310426301. The cubic root of 1021386057 is about 1007.0784628097.

The spelling of 1021386057 in words is "one billion, twenty-one million, three hundred eighty-six thousand, fifty-seven".