38421157 has 2 divisors, whose sum is σ = 38421158. Its totient is φ = 38421156.

The previous prime is 38421127. The next prime is 38421161. The reversal of 38421157 is 75112483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35414401 + 3006756 = 5951^2 + 1734^2 .

It is an emirp because it is prime and its reverse (75112483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38421157 - 2¹⁹ = 37896869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38421127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19210578 + 19210579.

It is an arithmetic number, because the mean of its divisors is an integer number (19210579).

Almost surely, 2^38421157 is an apocalyptic number.

It is an amenable number.

38421157 is a deficient number, since it is larger than the sum of its proper divisors (1).

38421157 is an equidigital number, since it uses as much as digits as its factorization.

38421157 is an evil number, because the sum of its binary digits is even.

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

The square root of 38421157 is about 6198.4802169564. The cubic root of 38421157 is about 337.4350148314.

The spelling of 38421157 in words is "thirty-eight million, four hundred twenty-one thousand, one hundred fifty-seven".