125450405 has 6 divisors (see below), whose sum is σ = 150570546. Its totient is φ = 100340288.

The previous prime is 125450399. The next prime is 125450411. The reversal of 125450405 is 504054521.

It is an interprime number because it is at equal distance from previous prime (125450399) and next prime (125450411).

It can be written as a sum of positive squares in 3 ways, for example, as 10510564 + 114939841 = 3242^2 + 10721^2 .

It is not a de Polignac number, because 125450405 - 2¹⁶ = 125384869 is a prime.

It is a super-2 number, since 2×125450405² = 31475608229328050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22541 + ... + 27549.

It is an arithmetic number, because the mean of its divisors is an integer number (25095091).

Almost surely, 2^125450405 is an apocalyptic number.

It is an amenable number.

125450405 is a deficient number, since it is larger than the sum of its proper divisors (25120141).

125450405 is an frugal number, since it uses more digits than its factorization.

125450405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10023 (or 5014 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 125450405 is about 11200.4644992964. The cubic root of 125450405 is about 500.5998201438.

The spelling of 125450405 in words is "one hundred twenty-five million, four hundred fifty thousand, four hundred five".