126155557 has 4 divisors (see below), whose sum is σ = 137624256. Its totient is φ = 114686860.

The previous prime is 126155551. The next prime is 126155563. The reversal of 126155557 is 755551621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (126155551) and next prime (126155563).

It is a cyclic number.

It is not a de Polignac number, because 126155557 - 2²³ = 117766949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126155551) 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, 5734333 + ... + 5734354.

It is an arithmetic number, because the mean of its divisors is an integer number (34406064).

Almost surely, 2^126155557 is an apocalyptic number.

It is an amenable number.

126155557 is a deficient number, since it is larger than the sum of its proper divisors (11468699).

126155557 is a wasteful number, since it uses less digits than its factorization.

126155557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11468698.

The product of its digits is 52500, while the sum is 37.

The square root of 126155557 is about 11231.8990825238. The cubic root of 126155557 is about 501.5360191251.

The spelling of 126155557 in words is "one hundred twenty-six million, one hundred fifty-five thousand, five hundred fifty-seven".