125661451 has 2 divisors, whose sum is σ = 125661452. Its totient is φ = 125661450.

The previous prime is 125661449. The next prime is 125661457. The reversal of 125661451 is 154166521.

It is a weak prime.

It is an emirp because it is prime and its reverse (154166521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125661451 - 2¹ = 125661449 is a prime.

Together with 125661449, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125661457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62830725 + 62830726.

It is an arithmetic number, because the mean of its divisors is an integer number (62830726).

Almost surely, 2^125661451 is an apocalyptic number.

125661451 is a deficient number, since it is larger than the sum of its proper divisors (1).

125661451 is an equidigital number, since it uses as much as digits as its factorization.

125661451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 125661451 is about 11209.8818459429. The cubic root of 125661451 is about 500.8803836063.

The spelling of 125661451 in words is "one hundred twenty-five million, six hundred sixty-one thousand, four hundred fifty-one".