125484781 has 2 divisors, whose sum is σ = 125484782. Its totient is φ = 125484780.

The previous prime is 125484719. The next prime is 125484791. The reversal of 125484781 is 187484521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119028100 + 6456681 = 10910^2 + 2541^2 .

It is a cyclic number.

It is not a de Polignac number, because 125484781 - 2⁹ = 125484269 is a prime.

It is a super-2 number, since 2×125484781² = 31492860525235922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125484791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62742390 + 62742391.

It is an arithmetic number, because the mean of its divisors is an integer number (62742391).

Almost surely, 2^125484781 is an apocalyptic number.

It is an amenable number.

125484781 is a deficient number, since it is larger than the sum of its proper divisors (1).

125484781 is an equidigital number, since it uses as much as digits as its factorization.

125484781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 40.

The square root of 125484781 is about 11201.9989733976. The cubic root of 125484781 is about 500.6455408620.

The spelling of 125484781 in words is "one hundred twenty-five million, four hundred eighty-four thousand, seven hundred eighty-one".