180046421 has 2 divisors, whose sum is σ = 180046422. Its totient is φ = 180046420.

The previous prime is 180046417. The next prime is 180046429. The reversal of 180046421 is 124640081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175695025 + 4351396 = 13255^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 180046421 - 2² = 180046417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180046429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90023210 + 90023211.

It is an arithmetic number, because the mean of its divisors is an integer number (90023211).

Almost surely, 2^180046421 is an apocalyptic number.

It is an amenable number.

180046421 is a deficient number, since it is larger than the sum of its proper divisors (1).

180046421 is an equidigital number, since it uses as much as digits as its factorization.

180046421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 180046421 is about 13418.1377619996. The cubic root of 180046421 is about 564.6701507495.

The spelling of 180046421 in words is "one hundred eighty million, forty-six thousand, four hundred twenty-one".