125122405442 has 8 divisors (see below), whose sum is σ = 190254616716. Its totient is φ = 61704199872.

The previous prime is 125122405411. The next prime is 125122405481. The reversal of 125122405442 is 244504221521.

It can be written as a sum of positive squares in 2 ways, for example, as 121948322521 + 3174082921 = 349211^2 + 56339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 125122405399 and 125122405408.

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, 428501243 + ... + 428501534.

Almost surely, 2^125122405442 is an apocalyptic number.

125122405442 is a deficient number, since it is larger than the sum of its proper divisors (65132211274).

125122405442 is an equidigital number, since it uses as much as digits as its factorization.

125122405442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857002852.

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 125122405442 its reverse (244504221521), we get a palindrome (369626626963).

The spelling of 125122405442 in words is "one hundred twenty-five billion, one hundred twenty-two million, four hundred five thousand, four hundred forty-two".