1201521546 has 48 divisors (see below), whose sum is σ = 2836385280. Its totient is φ = 376943040.

The previous prime is 1201521539. The next prime is 1201521617. The reversal of 1201521546 is 6451251021.

1201521546 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22890 + ... + 54101.

It is an arithmetic number, because the mean of its divisors is an integer number (59091360).

Almost surely, 2^1201521546 is an apocalyptic number.

1201521546 is an abundant number, since it is smaller than the sum of its proper divisors (1634863734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201521546 is a wasteful number, since it uses less digits than its factorization.

1201521546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77036 (or 77013 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1201521546 is about 34662.9708190167. The cubic root of 1201521546 is about 1063.1075139042.

Adding to 1201521546 its reverse (6451251021), we get a palindrome (7652772567).

The spelling of 1201521546 in words is "one billion, two hundred one million, five hundred twenty-one thousand, five hundred forty-six".