261752671 has 2 divisors, whose sum is σ = 261752672. Its totient is φ = 261752670.

The previous prime is 261752663. The next prime is 261752693. The reversal of 261752671 is 176257162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261752671 - 2³ = 261752663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261752671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261752371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130876335 + 130876336.

It is an arithmetic number, because the mean of its divisors is an integer number (130876336).

Almost surely, 2^261752671 is an apocalyptic number.

261752671 is a deficient number, since it is larger than the sum of its proper divisors (1).

261752671 is an equidigital number, since it uses as much as digits as its factorization.

261752671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 261752671 is about 16178.7722340108. The cubic root of 261752671 is about 639.6813770449.

The spelling of 261752671 in words is "two hundred sixty-one million, seven hundred fifty-two thousand, six hundred seventy-one".