1201521441 has 16 divisors (see below), whose sum is σ = 1642169088. Its totient is φ = 780969600.

The previous prime is 1201521407. The next prime is 1201521457. The reversal of 1201521441 is 1441251021.

It is not a de Polignac number, because 1201521441 - 2¹⁰ = 1201520417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201521491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320520 + ... + 324246.

It is an arithmetic number, because the mean of its divisors is an integer number (102635568).

Almost surely, 2^1201521441 is an apocalyptic number.

It is an amenable number.

1201521441 is a deficient number, since it is larger than the sum of its proper divisors (440647647).

1201521441 is a wasteful number, since it uses less digits than its factorization.

1201521441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6392.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1201521441 is about 34662.9693044321. The cubic root of 1201521441 is about 1063.1074829361.

Adding to 1201521441 its reverse (1441251021), we get a palindrome (2642772462).

The spelling of 1201521441 in words is "one billion, two hundred one million, five hundred twenty-one thousand, four hundred forty-one".