1057643121 has 4 divisors (see below), whose sum is σ = 1410190832. Its totient is φ = 705095412.

The previous prime is 1057643101. The next prime is 1057643183. The reversal of 1057643121 is 1213467501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1213467501 = 3 ⋅404489167.

It is not a de Polignac number, because 1057643121 - 2⁶ = 1057643057 is a prime.

It is a super-2 number, since 2×1057643121² = 2237217942797241282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057643101) 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, 176273851 + ... + 176273856.

It is an arithmetic number, because the mean of its divisors is an integer number (352547708).

Almost surely, 2^1057643121 is an apocalyptic number.

It is an amenable number.

1057643121 is a deficient number, since it is larger than the sum of its proper divisors (352547711).

1057643121 is an equidigital number, since it uses as much as digits as its factorization.

1057643121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352547710.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1057643121 is about 32521.4255683849. The cubic root of 1057643121 is about 1018.8565685449.

The spelling of 1057643121 in words is "one billion, fifty-seven million, six hundred forty-three thousand, one hundred twenty-one".