4155997 has 2 divisors, whose sum is σ = 4155998. Its totient is φ = 4155996.

The previous prime is 4155989. The next prime is 4156001. The reversal of 4155997 is 7995514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3481956 + 674041 = 1866^2 + 821^2 .

It is a cyclic number.

It is not a de Polignac number, because 4155997 - 2³ = 4155989 is a prime.

It is a super-2 number, since 2×4155997² = 34544622128018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4155917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077998 + 2077999.

It is an arithmetic number, because the mean of its divisors is an integer number (2077999).

Almost surely, 2^4155997 is an apocalyptic number.

It is an amenable number.

4155997 is a deficient number, since it is larger than the sum of its proper divisors (1).

4155997 is an equidigital number, since it uses as much as digits as its factorization.

4155997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 4155997 is about 2038.6262531421. The cubic root of 4155997 is about 160.7774273612. Note that the first 3 decimals are identical.

The spelling of 4155997 in words is "four million, one hundred fifty-five thousand, nine hundred ninety-seven".