1057221071 has 4 divisors (see below), whose sum is σ = 1093677000. Its totient is φ = 1020765144.

The previous prime is 1057221037. The next prime is 1057221079. The reversal of 1057221071 is 1701227501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1701227501 = 1933 ⋅880097.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1057221071 is a prime.

It is a super-2 number, since 2×1057221071² = 2235432785932774082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1057221071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057221079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18227921 + ... + 18227978.

It is an arithmetic number, because the mean of its divisors is an integer number (273419250).

Almost surely, 2^1057221071 is an apocalyptic number.

1057221071 is a deficient number, since it is larger than the sum of its proper divisors (36455929).

1057221071 is an equidigital number, since it uses as much as digits as its factorization.

1057221071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36455928.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 1057221071 is about 32514.9361217272. The cubic root of 1057221071 is about 1018.7210264082.

Adding to 1057221071 its reverse (1701227501), we get a palindrome (2758448572).

The spelling of 1057221071 in words is "one billion, fifty-seven million, two hundred twenty-one thousand, seventy-one".