1301621004 has 36 divisors (see below), whose sum is σ = 3293493840. Its totient is φ = 433440480.

The previous prime is 1301621003. The next prime is 1301621047. The reversal of 1301621004 is 4001261031.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1301621003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19582 + ... + 54650.

It is an arithmetic number, because the mean of its divisors is an integer number (91485940).

Almost surely, 2^1301621004 is an apocalyptic number.

It is an amenable number.

1301621004 is an abundant number, since it is smaller than the sum of its proper divisors (1991872836).

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

1301621004 is a wasteful number, since it uses less digits than its factorization.

1301621004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36110 (or 36105 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1301621004 is about 36077.9850324266. The cubic root of 1301621004 is about 1091.8463234211.

Adding to 1301621004 its reverse (4001261031), we get a palindrome (5302882035).

The spelling of 1301621004 in words is "one billion, three hundred one million, six hundred twenty-one thousand, four".