406155641 has 2 divisors, whose sum is σ = 406155642. Its totient is φ = 406155640.

The previous prime is 406155611. The next prime is 406155649. The reversal of 406155641 is 146551604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378108025 + 28047616 = 19445^2 + 5296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406155641 is a prime.

It is a super-2 number, since 2×406155641² = 329924809432241762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 406155598 and 406155607.

It is not a weakly prime, because it can be changed into another prime (406155649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203077820 + 203077821.

It is an arithmetic number, because the mean of its divisors is an integer number (203077821).

Almost surely, 2^406155641 is an apocalyptic number.

It is an amenable number.

406155641 is a deficient number, since it is larger than the sum of its proper divisors (1).

406155641 is an equidigital number, since it uses as much as digits as its factorization.

406155641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 406155641 is about 20153.3034761054. The cubic root of 406155641 is about 740.5666714994.

The spelling of 406155641 in words is "four hundred six million, one hundred fifty-five thousand, six hundred forty-one".