125551 has 2 divisors, whose sum is σ = 125552. Its totient is φ = 125550.

The previous prime is 125539. The next prime is 125591. The reversal of 125551 is 155521.

125551 is nontrivially palindromic in base 11.

It is a weak prime.

It is an emirp because it is prime and its reverse (155521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125551 - 2⁷ = 125423 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 (125591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62775 + 62776.

It is an arithmetic number, because the mean of its divisors is an integer number (62776).

2¹²⁵⁵⁵¹ is an apocalyptic number.

125551 is a deficient number, since it is larger than the sum of its proper divisors (1).

125551 is an equidigital number, since it uses as much as digits as its factorization.

125551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250, while the sum is 19.

The square root of 125551 is about 354.3317654402. The cubic root of 125551 is about 50.0733589832.

It can be divided in two parts, 125 and 551, that added together give a palindrome (676).

The spelling of 125551 in words is "one hundred twenty-five thousand, five hundred fifty-one".