125045205421 has 8 divisors (see below), whose sum is σ = 125399070720. Its totient is φ = 124691483472.

The previous prime is 125045205401. The next prime is 125045205451. The reversal of 125045205421 is 124502540521.

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

It is a cyclic number.

It is not a de Polignac number, because 125045205421 - 2⁹ = 125045204909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125045205401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850791 + ... + 1917163.

It is an arithmetic number, because the mean of its divisors is an integer number (15674883840).

Almost surely, 2^125045205421 is an apocalyptic number.

It is an amenable number.

125045205421 is a deficient number, since it is larger than the sum of its proper divisors (353865299).

125045205421 is an equidigital number, since it uses as much as digits as its factorization.

125045205421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71675.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 125045205421 its reverse (124502540521), we get a palindrome (249547745942).

The spelling of 125045205421 in words is "one hundred twenty-five billion, forty-five million, two hundred five thousand, four hundred twenty-one".