1201537 has 4 divisors (see below), whose sum is σ = 1206576. Its totient is φ = 1196500.

The previous prime is 1201531. The next prime is 1201553. The reversal of 1201537 is 7351021.

It is the 448-th star number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7351021 = 17 ⋅432413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201537 is a prime.

It is a Duffinian number.

1201537 is a lucky 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 3 ways as a sum of consecutive naturals, for example, 2143 + ... + 2644.

It is an arithmetic number, because the mean of its divisors is an integer number (301644).

2^1201537 is an apocalyptic number.

It is an amenable number.

1201537 is a deficient number, since it is larger than the sum of its proper divisors (5039).

1201537 is an equidigital number, since it uses as much as digits as its factorization.

1201537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1201537 is about 1096.1464318238. The cubic root of 1201537 is about 106.3112071790.

Adding to 1201537 its reverse (7351021), we get a palindrome (8552558).

The spelling of 1201537 in words is "one million, two hundred one thousand, five hundred thirty-seven".