126445405 has 8 divisors (see below), whose sum is σ = 160660152. Its totient is φ = 95205888.

The previous prime is 126445393. The next prime is 126445409. The reversal of 126445405 is 504544621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21874329 + 104571076 = 4677^2 + 10226^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126445405 - 2¹¹ = 126443357 is a prime.

It is a super-2 number, since 2×126445405² = 31976880891228050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126445409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743712 + ... + 743881.

It is an arithmetic number, because the mean of its divisors is an integer number (20082519).

Almost surely, 2^126445405 is an apocalyptic number.

It is an amenable number.

126445405 is a deficient number, since it is larger than the sum of its proper divisors (34214747).

126445405 is a wasteful number, since it uses less digits than its factorization.

126445405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487615.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 126445405 is about 11244.7945734904. The cubic root of 126445405 is about 501.9198257701.

The spelling of 126445405 in words is "one hundred twenty-six million, four hundred forty-five thousand, four hundred five".