125502154421 has 4 divisors (see below), whose sum is σ = 143431033632. Its totient is φ = 107573275212.

The previous prime is 125502154399. The next prime is 125502154433. The reversal of 125502154421 is 124451205521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124451205521 = 52391 ⋅2375431.

It is a cyclic number.

It is not a de Polignac number, because 125502154421 - 2⁶ = 125502154357 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 (125502154721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8964439595 + ... + 8964439608.

It is an arithmetic number, because the mean of its divisors is an integer number (35857758408).

Almost surely, 2^125502154421 is an apocalyptic number.

It is an amenable number.

125502154421 is a deficient number, since it is larger than the sum of its proper divisors (17928879211).

125502154421 is an equidigital number, since it uses as much as digits as its factorization.

125502154421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17928879210.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 125502154421 its reverse (124451205521), we get a palindrome (249953359942).

The spelling of 125502154421 in words is "one hundred twenty-five billion, five hundred two million, one hundred fifty-four thousand, four hundred twenty-one".