125553405 has 16 divisors (see below), whose sum is σ = 202958784. Its totient is φ = 66270720.

The previous prime is 125553401. The next prime is 125553409. The reversal of 125553405 is 504355521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (125553401) and next prime (125553409).

It is not a de Polignac number, because 125553405 - 2² = 125553401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125553401) 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, 41691 + ... + 44600.

It is an arithmetic number, because the mean of its divisors is an integer number (12684924).

Almost surely, 2^125553405 is an apocalyptic number.

125553405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125553405 is a deficient number, since it is larger than the sum of its proper divisors (77405379).

125553405 is an equidigital number, since it uses as much as digits as its factorization.

125553405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86396.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 125553405 is about 11205.0615794827. The cubic root of 125553405 is about 500.7367870896.

The spelling of 125553405 in words is "one hundred twenty-five million, five hundred fifty-three thousand, four hundred five".