1057498394 has 4 divisors (see below), whose sum is σ = 1586247594. Its totient is φ = 528749196.

The previous prime is 1057498331. The next prime is 1057498397. The reversal of 1057498394 is 4938947501.

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

It can be written as a sum of positive squares in only one way, i.e., 1057095169 + 403225 = 32513^2 + 635^2 .

It is a super-2 number, since 2×1057498394² = 2236605706625158472, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1057498397) 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 as a sum of consecutive naturals, namely, 264374597 + ... + 264374600.

Almost surely, 2^1057498394 is an apocalyptic number.

1057498394 is a deficient number, since it is larger than the sum of its proper divisors (528749200).

1057498394 is an equidigital number, since it uses as much as digits as its factorization.

1057498394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528749199.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 1057498394 is about 32519.2003899235. The cubic root of 1057498394 is about 1018.8100932648.

The spelling of 1057498394 in words is "one billion, fifty-seven million, four hundred ninety-eight thousand, three hundred ninety-four".