1201521 has 8 divisors (see below), whose sum is σ = 1612864. Its totient is φ = 795600.

The previous prime is 1201513. The next prime is 1201523. The reversal of 1201521 is 1251021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1201521 - 2³ = 1201513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201497 and 1201506.

It is not an unprimeable number, because it can be changed into a prime (1201523) 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, 805 + ... + 1746.

It is an arithmetic number, because the mean of its divisors is an integer number (201608).

2^1201521 is an apocalyptic number.

It is an amenable number.

1201521 is a deficient number, since it is larger than the sum of its proper divisors (411343).

1201521 is a wasteful number, since it uses less digits than its factorization.

1201521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1201521 is about 1096.1391335045. The cubic root of 1201521 is about 106.3107352870.

Adding to 1201521 its reverse (1251021), we get a palindrome (2452542).

The spelling of 1201521 in words is "one million, two hundred one thousand, five hundred twenty-one".