161245930 has 16 divisors (see below), whose sum is σ = 290773800. Its totient is φ = 64380352.

The previous prime is 161245871. The next prime is 161245937. The reversal of 161245930 is 39542161.

It can be written as a sum of positive squares in 4 ways, for example, as 141824281 + 19421649 = 11909^2 + 4407^2 .

It is a junction number, because it is equal to n+sod(n) for n = 161245892 and 161245901.

It is not an unprimeable number, because it can be changed into a prime (161245937) 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, 8905 + ... + 20044.

Almost surely, 2^161245930 is an apocalyptic number.

161245930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161245930 is a deficient number, since it is larger than the sum of its proper divisors (129527870).

161245930 is a wasteful number, since it uses less digits than its factorization.

161245930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29513.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 161245930 is about 12698.2648420956. The cubic root of 161245930 is about 544.2890373081.

The spelling of 161245930 in words is "one hundred sixty-one million, two hundred forty-five thousand, nine hundred thirty".