1621030130 has 16 divisors (see below), whose sum is σ = 2927182104. Its totient is φ = 646339200.

The previous prime is 1621030129. The next prime is 1621030157. The reversal of 1621030130 is 310301261.

It can be written as a sum of positive squares in 4 ways, for example, as 564585121 + 1056445009 = 23761^2 + 32503^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1621030099 and 1621030108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255821 + ... + 262080.

Almost surely, 2^1621030130 is an apocalyptic number.

1621030130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1621030130 is a deficient number, since it is larger than the sum of its proper divisors (1306151974).

1621030130 is a wasteful number, since it uses less digits than its factorization.

1621030130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518221.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1621030130 is about 40262.0184541212. The cubic root of 1621030130 is about 1174.7091792707.

Adding to 1621030130 its reverse (310301261), we get a palindrome (1931331391).

The spelling of 1621030130 in words is "one billion, six hundred twenty-one million, thirty thousand, one hundred thirty".