125491481 has 2 divisors, whose sum is σ = 125491482. Its totient is φ = 125491480.

The previous prime is 125491451. The next prime is 125491507. The reversal of 125491481 is 184194521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122655625 + 2835856 = 11075^2 + 1684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125491481 is a prime.

It is a super-2 number, since 2×125491481² = 31496223607146722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125491411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62745740 + 62745741.

It is an arithmetic number, because the mean of its divisors is an integer number (62745741).

Almost surely, 2^125491481 is an apocalyptic number.

It is an amenable number.

125491481 is a deficient number, since it is larger than the sum of its proper divisors (1).

125491481 is an equidigital number, since it uses as much as digits as its factorization.

125491481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 35.

The square root of 125491481 is about 11202.2980231736. The cubic root of 125491481 is about 500.6544510140.

The spelling of 125491481 in words is "one hundred twenty-five million, four hundred ninety-one thousand, four hundred eighty-one".