1201538 has 16 divisors (see below), whose sum is σ = 1995000. Its totient is φ = 539136.

The previous prime is 1201531. The next prime is 1201553. The reversal of 1201538 is 8351021.

It can be written as a sum of positive squares in 4 ways, for example, as 1014049 + 187489 = 1007^2 + 433^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1201531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338 + ... + 1586.

2^1201538 is an apocalyptic number.

1201538 is a deficient number, since it is larger than the sum of its proper divisors (793462).

1201538 is a wasteful number, since it uses less digits than its factorization.

1201538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1201538 is about 1096.1468879671. The cubic root of 1201538 is about 106.3112366721.

Adding to 1201538 its reverse (8351021), we get a palindrome (9552559).

The spelling of 1201538 in words is "one million, two hundred one thousand, five hundred thirty-eight".