125136240451 has 4 divisors (see below), whose sum is σ = 125137976472. Its totient is φ = 125134504432.

The previous prime is 125136240431. The next prime is 125136240527. The reversal of 125136240451 is 154042631521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154042631521 = 239 ⋅644529839.

It is a cyclic number.

It is not a de Polignac number, because 125136240451 - 2¹⁵ = 125136207683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125136240431) 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, 754981 + ... + 905686.

It is an arithmetic number, because the mean of its divisors is an integer number (31284494118).

Almost surely, 2^125136240451 is an apocalyptic number.

125136240451 is a deficient number, since it is larger than the sum of its proper divisors (1736021).

125136240451 is an equidigital number, since it uses as much as digits as its factorization.

125136240451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736020.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 125136240451 its reverse (154042631521), we get a palindrome (279178871972).

The spelling of 125136240451 in words is "one hundred twenty-five billion, one hundred thirty-six million, two hundred forty thousand, four hundred fifty-one".