1621326130 has 16 divisors (see below), whose sum is σ = 2918873880. Its totient is φ = 648422272.

The previous prime is 1621326121. The next prime is 1621326139. The reversal of 1621326130 is 316231261.

It is an interprime number because it is at equal distance from previous prime (1621326121) and next prime (1621326139).

It can be written as a sum of positive squares in 4 ways, for example, as 1590334641 + 30991489 = 39879^2 + 5567^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1621326095 and 1621326104.

It is not an unprimeable number, because it can be changed into a prime (1621326139) 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, 80652 + ... + 98728.

Almost surely, 2^1621326130 is an apocalyptic number.

1621326130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1621326130 is a deficient number, since it is larger than the sum of its proper divisors (1297547750).

1621326130 is a wasteful number, since it uses less digits than its factorization.

1621326130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27053.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1621326130 is about 40265.6942073522. The cubic root of 1621326130 is about 1174.7806755266.

Adding to 1621326130 its reverse (316231261), we get a palindrome (1937557391).

The spelling of 1621326130 in words is "one billion, six hundred twenty-one million, three hundred twenty-six thousand, one hundred thirty".