1905157 has 2 divisors, whose sum is σ = 1905158. Its totient is φ = 1905156.

The previous prime is 1905131. The next prime is 1905161. The reversal of 1905157 is 7515091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1640961 + 264196 = 1281^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1905157 - 2¹⁵ = 1872389 is a prime.

1905157 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1905257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952578 + 952579.

It is an arithmetic number, because the mean of its divisors is an integer number (952579).

2^1905157 is an apocalyptic number.

It is an amenable number.

1905157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1905157 is an equidigital number, since it uses as much as digits as its factorization.

1905157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1575, while the sum is 28.

The square root of 1905157 is about 1380.2742481116. The cubic root of 1905157 is about 123.9681890303.

The spelling of 1905157 in words is "one million, nine hundred five thousand, one hundred fifty-seven".