1301861620 has 24 divisors (see below), whose sum is σ = 2828183400. Its totient is φ = 502787712.

The previous prime is 1301861579. The next prime is 1301861653. The reversal of 1301861620 is 261681031.

It can be written as a sum of positive squares in 4 ways, for example, as 2835856 + 1299025764 = 1684^2 + 36042^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121715 + ... + 1122874.

It is an arithmetic number, because the mean of its divisors is an integer number (117840975).

Almost surely, 2^1301861620 is an apocalyptic number.

1301861620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301861620 is an abundant number, since it is smaller than the sum of its proper divisors (1526321780).

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

1301861620 is a wasteful number, since it uses less digits than its factorization.

1301861620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244627 (or 2244625 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1301861620 is about 36081.3195434979. The cubic root of 1301861620 is about 1091.9135983824.

The spelling of 1301861620 in words is "one billion, three hundred one million, eight hundred sixty-one thousand, six hundred twenty".