261077 has 2 divisors, whose sum is σ = 261078. Its totient is φ = 261076.
The previous prime is 261071. The next prime is 261089. The reversal of 261077 is 770162.
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 256036 + 5041 = 506^2 + 71^2 .
It is a cyclic number.
It is not a de Polignac number, because 261077 - 24 = 261061 is a prime.
It is a super-2 number, since 2×2610772 = 136322399858, which contains 22 as substring.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261077.
It is not a weakly prime, because it can be changed into another prime (261071) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130538 + 130539.
It is an arithmetic number, because the mean of its divisors is an integer number (130539).
2261077 is an apocalyptic number.
It is an amenable number.
261077 is a deficient number, since it is larger than the sum of its proper divisors (1).
261077 is an equidigital number, since it uses as much as digits as its factorization.
261077 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 588, while the sum is 23.
The square root of 261077 is about 510.9569453486. The cubic root of 261077 is about 63.9130492394.
The spelling of 261077 in words is "two hundred sixty-one thousand, seventy-seven".
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