38557121 has 2 divisors, whose sum is σ = 38557122. Its totient is φ = 38557120.

The previous prime is 38557081. The next prime is 38557151. The reversal of 38557121 is 12175583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19678096 + 18879025 = 4436^2 + 4345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38557121 is a prime.

It is not a weakly prime, because it can be changed into another prime (38557151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19278560 + 19278561.

It is an arithmetic number, because the mean of its divisors is an integer number (19278561).

Almost surely, 2^38557121 is an apocalyptic number.

It is an amenable number.

38557121 is a deficient number, since it is larger than the sum of its proper divisors (1).

38557121 is an equidigital number, since it uses as much as digits as its factorization.

38557121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 32.

The square root of 38557121 is about 6209.4380583109. The cubic root of 38557121 is about 337.8325822613.

The spelling of 38557121 in words is "thirty-eight million, five hundred fifty-seven thousand, one hundred twenty-one".