125403630242045 has 16 divisors (see below), whose sum is σ = 159467302916208. Its totient is φ = 94343971307520.

The previous prime is 125403630241979. The next prime is 125403630242131. The reversal of 125403630242045 is 540242036304521.

It can be written as a sum of positive squares in 8 ways, for example, as 4224858258916 + 121178771983129 = 2055446^2 + 11008123^2 .

It is not a de Polignac number, because 125403630242045 - 2¹⁶ = 125403630176509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125403630241993 and 125403630242011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606033296 + ... + 606240185.

It is an arithmetic number, because the mean of its divisors is an integer number (9966706432263).

Almost surely, 2^{125403630242045} is an apocalyptic number.

It is an amenable number.

125403630242045 is a deficient number, since it is larger than the sum of its proper divisors (34063672674163).

125403630242045 is a wasteful number, since it uses less digits than its factorization.

125403630242045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212274720.

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 125403630242045 its reverse (540242036304521), we get a palindrome (665645666546566).

The spelling of 125403630242045 in words is "one hundred twenty-five trillion, four hundred three billion, six hundred thirty million, two hundred forty-two thousand, forty-five".