125247785501 has 4 divisors (see below), whose sum is σ = 125298722400. Its totient is φ = 125196848604.

The previous prime is 125247785491. The next prime is 125247785513. The reversal of 125247785501 is 105587742521.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 125247785501 - 2¹⁰ = 125247784477 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 (125247785561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25464761 + ... + 25469678.

It is an arithmetic number, because the mean of its divisors is an integer number (31324680600).

Almost surely, 2^125247785501 is an apocalyptic number.

It is an amenable number.

125247785501 is a deficient number, since it is larger than the sum of its proper divisors (50936899).

125247785501 is an equidigital number, since it uses as much as digits as its factorization.

125247785501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50936898.

The product of its (nonzero) digits is 784000, while the sum is 47.

The spelling of 125247785501 in words is "one hundred twenty-five billion, two hundred forty-seven million, seven hundred eighty-five thousand, five hundred one".