125211951461 has 4 divisors (see below), whose sum is σ = 125247136800. Its totient is φ = 125176766124.

The previous prime is 125211951439. The next prime is 125211951559. The reversal of 125211951461 is 164159112521.

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: 164159112521 = 10597 ⋅15491093.

It is a cyclic number.

It is not a de Polignac number, because 125211951461 - 2¹⁴ = 125211935077 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 (125211951061) 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, 17587331 + ... + 17594448.

It is an arithmetic number, because the mean of its divisors is an integer number (31311784200).

Almost surely, 2^125211951461 is an apocalyptic number.

It is an amenable number.

125211951461 is a deficient number, since it is larger than the sum of its proper divisors (35185339).

125211951461 is an equidigital number, since it uses as much as digits as its factorization.

125211951461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35185338.

The product of its digits is 21600, while the sum is 38.

The spelling of 125211951461 in words is "one hundred twenty-five billion, two hundred eleven million, nine hundred fifty-one thousand, four hundred sixty-one".