125021343245 has 4 divisors (see below), whose sum is σ = 150025611900. Its totient is φ = 100017074592.

The previous prime is 125021343233. The next prime is 125021343259. The reversal of 125021343245 is 542343120521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542343120521 = 11719 ⋅46278959.

It can be written as a sum of positive squares in 2 ways, for example, as 43461408676 + 81559934569 = 208474^2 + 285587^2 .

It is a cyclic number.

It is not a de Polignac number, because 125021343245 - 2¹⁶ = 125021277709 is a prime.

It is a super-3 number, since 3×125021343245³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12502134320 + ... + 12502134329.

It is an arithmetic number, because the mean of its divisors is an integer number (37506402975).

Almost surely, 2^125021343245 is an apocalyptic number.

It is an amenable number.

125021343245 is a deficient number, since it is larger than the sum of its proper divisors (25004268655).

125021343245 is an equidigital number, since it uses as much as digits as its factorization.

125021343245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25004268654.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 125021343245 its reverse (542343120521), we get a palindrome (667364463766).

The spelling of 125021343245 in words is "one hundred twenty-five billion, twenty-one million, three hundred forty-three thousand, two hundred forty-five".