1573145 has 12 divisors (see below), whose sum is σ = 2196324. Its totient is φ = 1078560.

The previous prime is 1573141. The next prime is 1573151. The reversal of 1573145 is 5413751.

1573145 = 75² + 76² + ... + 172².

It can be written as a sum of positive squares in 2 ways, for example, as 499849 + 1073296 = 707^2 + 1036^2 .

It is not a de Polignac number, because 1573145 - 2² = 1573141 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1573141) 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, 2966 + ... + 3455.

It is an arithmetic number, because the mean of its divisors is an integer number (183027).

2^1573145 is an apocalyptic number.

It is an amenable number.

1573145 is a deficient number, since it is larger than the sum of its proper divisors (623179).

1573145 is an equidigital number, since it uses as much as digits as its factorization.

1573145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440 (or 6433 counting only the distinct ones).

The product of its digits is 2100, while the sum is 26.

The square root of 1573145 is about 1254.2507723737. The cubic root of 1573145 is about 116.3026431323.

Adding to 1573145 its reverse (5413751), we get a palindrome (6986896).

Subtracting 1573145 from its reverse (5413751), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 1573145 in words is "one million, five hundred seventy-three thousand, one hundred forty-five".