1201521404 has 24 divisors (see below), whose sum is σ = 2133129600. Its totient is φ = 592113456.

The previous prime is 1201521367. The next prime is 1201521407. The reversal of 1201521404 is 4041251021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201521407) 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, 78119 + ... + 92225.

It is an arithmetic number, because the mean of its divisors is an integer number (88880400).

Almost surely, 2^1201521404 is an apocalyptic number.

It is an amenable number.

1201521404 is a deficient number, since it is larger than the sum of its proper divisors (931608196).

1201521404 is a wasteful number, since it uses less digits than its factorization.

1201521404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14417 (or 14415 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1201521404 is about 34662.9687707213. The cubic root of 1201521404 is about 1063.1074720236.

Adding to 1201521404 its reverse (4041251021), we get a palindrome (5242772425).

The spelling of 1201521404 in words is "one billion, two hundred one million, five hundred twenty-one thousand, four hundred four".