125321405 has 16 divisors (see below), whose sum is σ = 168493824. Its totient is φ = 88678080.

The previous prime is 125321401. The next prime is 125321459. The reversal of 125321405 is 504123521.

It is not a de Polignac number, because 125321405 - 2² = 125321401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125321401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28757 + ... + 32826.

It is an arithmetic number, because the mean of its divisors is an integer number (10530864).

Almost surely, 2^125321405 is an apocalyptic number.

It is an amenable number.

125321405 is a deficient number, since it is larger than the sum of its proper divisors (43172419).

125321405 is a wasteful number, since it uses less digits than its factorization.

125321405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61636.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 125321405 is about 11194.7043283867. The cubic root of 125321405 is about 500.4281732307.

Adding to 125321405 its reverse (504123521), we get a palindrome (629444926).

The spelling of 125321405 in words is "one hundred twenty-five million, three hundred twenty-one thousand, four hundred five".