125520161461 has 4 divisors (see below), whose sum is σ = 125649966112. Its totient is φ = 125390356812.

The previous prime is 125520161443. The next prime is 125520161467. The reversal of 125520161461 is 164161025521.

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 125520161461 - 2⁹ = 125520160949 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 (125520161467) 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, 64900875 + ... + 64902808.

It is an arithmetic number, because the mean of its divisors is an integer number (31412491528).

Almost surely, 2^125520161461 is an apocalyptic number.

It is an amenable number.

125520161461 is a deficient number, since it is larger than the sum of its proper divisors (129804651).

125520161461 is an equidigital number, since it uses as much as digits as its factorization.

125520161461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129804650.

The product of its (nonzero) digits is 14400, while the sum is 34.

Adding to 125520161461 its reverse (164161025521), we get a palindrome (289681186982).

The spelling of 125520161461 in words is "one hundred twenty-five billion, five hundred twenty million, one hundred sixty-one thousand, four hundred sixty-one".