125479681 has 2 divisors, whose sum is σ = 125479682. Its totient is φ = 125479680.

The previous prime is 125479657. The next prime is 125479687. The reversal of 125479681 is 186974521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117527281 + 7952400 = 10841^2 + 2820^2 .

It is a cyclic number.

It is not a de Polignac number, because 125479681 - 2¹¹ = 125477633 is a prime.

It is a super-2 number, since 2×125479681² = 31490300687723522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125479687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62739840 + 62739841.

It is an arithmetic number, because the mean of its divisors is an integer number (62739841).

Almost surely, 2^125479681 is an apocalyptic number.

It is an amenable number.

125479681 is a deficient number, since it is larger than the sum of its proper divisors (1).

125479681 is an equidigital number, since it uses as much as digits as its factorization.

125479681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 125479681 is about 11201.7713331419. The cubic root of 125479681 is about 500.6387582949.

The spelling of 125479681 in words is "one hundred twenty-five million, four hundred seventy-nine thousand, six hundred eighty-one".