125898749 has 2 divisors, whose sum is σ = 125898750. Its totient is φ = 125898748.

The previous prime is 125898739. The next prime is 125898761. The reversal of 125898749 is 947898521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125843524 + 55225 = 11218^2 + 235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125898749 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 125898749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125898739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62949374 + 62949375.

It is an arithmetic number, because the mean of its divisors is an integer number (62949375).

Almost surely, 2^125898749 is an apocalyptic number.

It is an amenable number.

125898749 is a deficient number, since it is larger than the sum of its proper divisors (1).

125898749 is an equidigital number, since it uses as much as digits as its factorization.

125898749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 53.

The square root of 125898749 is about 11220.4611759054. The cubic root of 125898749 is about 501.1954714182.

The spelling of 125898749 in words is "one hundred twenty-five million, eight hundred ninety-eight thousand, seven hundred forty-nine".