26157961 has 2 divisors, whose sum is σ = 26157962. Its totient is φ = 26157960.

The previous prime is 26157907. The next prime is 26157977. The reversal of 26157961 is 16975162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13690000 + 12467961 = 3700^2 + 3531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26157961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26157961.

It is not a weakly prime, because it can be changed into another prime (26152961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13078980 + 13078981.

It is an arithmetic number, because the mean of its divisors is an integer number (13078981).

Almost surely, 2^26157961 is an apocalyptic number.

It is an amenable number.

26157961 is a deficient number, since it is larger than the sum of its proper divisors (1).

26157961 is an equidigital number, since it uses as much as digits as its factorization.

26157961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 26157961 is about 5114.4854091101. The cubic root of 26157961 is about 296.8483431799.

The spelling of 26157961 in words is "twenty-six million, one hundred fifty-seven thousand, nine hundred sixty-one".