125561087 has 2 divisors, whose sum is σ = 125561088. Its totient is φ = 125561086.

The previous prime is 125561083. The next prime is 125561123. The reversal of 125561087 is 780165521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125561087 - 2² = 125561083 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125561083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62780543 + 62780544.

It is an arithmetic number, because the mean of its divisors is an integer number (62780544).

Almost surely, 2^125561087 is an apocalyptic number.

125561087 is a deficient number, since it is larger than the sum of its proper divisors (1).

125561087 is an equidigital number, since it uses as much as digits as its factorization.

125561087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 125561087 is about 11205.4043657514. The cubic root of 125561087 is about 500.7469994279.

The spelling of 125561087 in words is "one hundred twenty-five million, five hundred sixty-one thousand, eighty-seven".