38142157 has 2 divisors, whose sum is σ = 38142158. Its totient is φ = 38142156.

The previous prime is 38142151. The next prime is 38142187. The reversal of 38142157 is 75124183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24790441 + 13351716 = 4979^2 + 3654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38142157 is a prime.

It is a super-2 number, since 2×38142157² = 2909648281225298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38142151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19071078 + 19071079.

It is an arithmetic number, because the mean of its divisors is an integer number (19071079).

Almost surely, 2^38142157 is an apocalyptic number.

It is an amenable number.

38142157 is a deficient number, since it is larger than the sum of its proper divisors (1).

38142157 is an equidigital number, since it uses as much as digits as its factorization.

38142157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 38142157 is about 6175.9336945923. The cubic root of 38142157 is about 336.6162543650.

The spelling of 38142157 in words is "thirty-eight million, one hundred forty-two thousand, one hundred fifty-seven".