26490157 has 2 divisors, whose sum is σ = 26490158. Its totient is φ = 26490156.

The previous prime is 26490133. The next prime is 26490169. The reversal of 26490157 is 75109462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16434916 + 10055241 = 4054^2 + 3171^2 .

It is a cyclic number.

It is not a de Polignac number, because 26490157 - 2¹⁹ = 25965869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26490127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13245078 + 13245079.

It is an arithmetic number, because the mean of its divisors is an integer number (13245079).

Almost surely, 2^26490157 is an apocalyptic number.

It is an amenable number.

26490157 is a deficient number, since it is larger than the sum of its proper divisors (1).

26490157 is an equidigital number, since it uses as much as digits as its factorization.

26490157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 26490157 is about 5146.8589450266. The cubic root of 26490157 is about 298.0996806301.

The spelling of 26490157 in words is "twenty-six million, four hundred ninety thousand, one hundred fifty-seven".