125420420355 has 32 divisors (see below), whose sum is σ = 203144454144. Its totient is φ = 66071609856.

The previous prime is 125420420351. The next prime is 125420420357. The reversal of 125420420355 is 553024024521.

It is a happy number.

It is not a de Polignac number, because 125420420355 - 2² = 125420420351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125420420351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287419 + ... + 577451.

It is an arithmetic number, because the mean of its divisors is an integer number (6348264192).

Almost surely, 2^125420420355 is an apocalyptic number.

125420420355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125420420355 is a deficient number, since it is larger than the sum of its proper divisors (77724033789).

125420420355 is a wasteful number, since it uses less digits than its factorization.

125420420355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290395.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 125420420355 its reverse (553024024521), we get a palindrome (678444444876).

The spelling of 125420420355 in words is "one hundred twenty-five billion, four hundred twenty million, four hundred twenty thousand, three hundred fifty-five".