125340405 has 16 divisors (see below), whose sum is σ = 212341824. Its totient is φ = 62915840.

The previous prime is 125340401. The next prime is 125340427. The reversal of 125340405 is 504043521.

It is not a de Polignac number, because 125340405 - 2² = 125340401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125340401) 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, 245511 + ... + 246020.

It is an arithmetic number, because the mean of its divisors is an integer number (13271364).

Almost surely, 2^125340405 is an apocalyptic number.

125340405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125340405 is a deficient number, since it is larger than the sum of its proper divisors (87001419).

125340405 is a wasteful number, since it uses less digits than its factorization.

125340405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491556.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 125340405 is about 11195.5529117592. The cubic root of 125340405 is about 500.4534619535.

Adding to 125340405 its reverse (504043521), we get a palindrome (629383926).

The spelling of 125340405 in words is "one hundred twenty-five million, three hundred forty thousand, four hundred five".