125461421 has 2 divisors, whose sum is σ = 125461422. Its totient is φ = 125461420.

The previous prime is 125461381. The next prime is 125461423. The reversal of 125461421 is 124164521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121110025 + 4351396 = 11005^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 125461421 - 2²² = 121267117 is a prime.

It is a Sophie Germain prime.

Together with 125461423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125461423) 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, 62730710 + 62730711.

It is an arithmetic number, because the mean of its divisors is an integer number (62730711).

Almost surely, 2^125461421 is an apocalyptic number.

It is an amenable number.

125461421 is a deficient number, since it is larger than the sum of its proper divisors (1).

125461421 is an equidigital number, since it uses as much as digits as its factorization.

125461421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 125461421 is about 11200.9562538205. The cubic root of 125461421 is about 500.6144725377.

The spelling of 125461421 in words is "one hundred twenty-five million, four hundred sixty-one thousand, four hundred twenty-one".