126478577 has 4 divisors (see below), whose sum is σ = 126753396. Its totient is φ = 126203760.

The previous prime is 126478553. The next prime is 126478603. The reversal of 126478577 is 775874621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87590881 + 38887696 = 9359^2 + 6236^2 .

It is a cyclic number.

It is not a de Polignac number, because 126478577 - 2¹⁶ = 126413041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126478507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136718 + ... + 137639.

It is an arithmetic number, because the mean of its divisors is an integer number (31688349).

Almost surely, 2^126478577 is an apocalyptic number.

It is an amenable number.

126478577 is a deficient number, since it is larger than the sum of its proper divisors (274819).

126478577 is an equidigital number, since it uses as much as digits as its factorization.

126478577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274818.

The product of its digits is 658560, while the sum is 47.

The square root of 126478577 is about 11246.2694703622. The cubic root of 126478577 is about 501.9637135615.

The spelling of 126478577 in words is "one hundred twenty-six million, four hundred seventy-eight thousand, five hundred seventy-seven".