1301021872 has 20 divisors (see below), whose sum is σ = 2524258080. Its totient is φ = 649600448.

The previous prime is 1301021837. The next prime is 1301021873. The reversal of 1301021872 is 2781201031.

It is a happy number.

It is a super-2 number, since 2×1301021872² = 3385315822844768768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1301021873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45043 + ... + 68050.

It is an arithmetic number, because the mean of its divisors is an integer number (126212904).

Almost surely, 2^1301021872 is an apocalyptic number.

It is an amenable number.

1301021872 is a deficient number, since it is larger than the sum of its proper divisors (1223236208).

1301021872 is a wasteful number, since it uses less digits than its factorization.

1301021872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113820 (or 113814 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1301021872 is about 36069.6807859454. The cubic root of 1301021872 is about 1091.6787732498.

The spelling of 1301021872 in words is "one billion, three hundred one million, twenty-one thousand, eight hundred seventy-two".