1201545 has 12 divisors (see below), whose sum is σ = 2082756. Its totient is φ = 640800.

The previous prime is 1201531. The next prime is 1201553. The reversal of 1201545 is 5451021.

1201545 is a `hidden beast` number, since 120 + 1 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 233289 + 968256 = 483^2 + 984^2 .

It is not a de Polignac number, because 1201545 - 2⁵ = 1201513 is a prime.

It is an Ulam number.

It is a Curzon number.

1201545 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13306 + ... + 13395.

It is an arithmetic number, because the mean of its divisors is an integer number (173563).

2^1201545 is an apocalyptic number.

1201545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201545 is a deficient number, since it is larger than the sum of its proper divisors (881211).

1201545 is a wasteful number, since it uses less digits than its factorization.

1201545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26712 (or 26709 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1201545 is about 1096.1500809652. The cubic root of 1201545 is about 106.3114431234.

Adding to 1201545 its reverse (5451021), we get a palindrome (6652566).

The spelling of 1201545 in words is "one million, two hundred one thousand, five hundred forty-five".