1057245649 has 4 divisors (see below), whose sum is σ = 1057422400. Its totient is φ = 1057068900.

The previous prime is 1057245647. The next prime is 1057245661. The reversal of 1057245649 is 9465427501.

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 1057245649 - 2¹ = 1057245647 is a prime.

It is a super-2 number, since 2×1057245649² = 2235536724658862402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057245647) 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, 79077 + ... + 91474.

It is an arithmetic number, because the mean of its divisors is an integer number (264355600).

Almost surely, 2^1057245649 is an apocalyptic number.

It is an amenable number.

1057245649 is a deficient number, since it is larger than the sum of its proper divisors (176751).

1057245649 is an equidigital number, since it uses as much as digits as its factorization.

1057245649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176750.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 1057245649 is about 32515.3140689122. The cubic root of 1057245649 is about 1018.7289206674.

The spelling of 1057245649 in words is "one billion, fifty-seven million, two hundred forty-five thousand, six hundred forty-nine".