1573135445 has 12 divisors (see below), whose sum is σ = 2195969004. Its totient is φ = 1078721280.

The previous prime is 1573135441. The next prime is 1573135451. The reversal of 1573135445 is 5445313751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 750650404 + 822485041 = 27398^2 + 28679^2 .

It is not a de Polignac number, because 1573135445 - 2² = 1573135441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1573135399 and 1573135408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1573135441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3210236 + ... + 3210725.

It is an arithmetic number, because the mean of its divisors is an integer number (182997417).

Almost surely, 2^1573135445 is an apocalyptic number.

It is an amenable number.

1573135445 is a deficient number, since it is larger than the sum of its proper divisors (622833559).

1573135445 is an equidigital number, since it uses as much as digits as its factorization.

1573135445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6420980 (or 6420973 counting only the distinct ones).

The product of its digits is 126000, while the sum is 38.

The square root of 1573135445 is about 39662.7715244409. The cubic root of 1573135445 is about 1163.0240766466.

The spelling of 1573135445 in words is "one billion, five hundred seventy-three million, one hundred thirty-five thousand, four hundred forty-five".