125337781 has 2 divisors, whose sum is σ = 125337782. Its totient is φ = 125337780.

The previous prime is 125337761. The next prime is 125337799. The reversal of 125337781 is 187733521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109537156 + 15800625 = 10466^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 125337781 - 2⁹ = 125337269 is a prime.

It is a super-2 number, since 2×125337781² = 31419118692007922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125337781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125337731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62668890 + 62668891.

It is an arithmetic number, because the mean of its divisors is an integer number (62668891).

Almost surely, 2^125337781 is an apocalyptic number.

It is an amenable number.

125337781 is a deficient number, since it is larger than the sum of its proper divisors (1).

125337781 is an equidigital number, since it uses as much as digits as its factorization.

125337781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 125337781 is about 11195.4357217573. The cubic root of 125337781 is about 500.4499695999.

The spelling of 125337781 in words is "one hundred twenty-five million, three hundred thirty-seven thousand, seven hundred eighty-one".