126505157 has 4 divisors (see below), whose sum is σ = 126550080. Its totient is φ = 126460236.

The previous prime is 126505147. The next prime is 126505187. The reversal of 126505157 is 751505621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 751505621 = 17 ⋅44206213.

It is a cyclic number.

It is not a de Polignac number, because 126505157 - 2⁸ = 126504901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126505147) 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, 17933 + ... + 23970.

It is an arithmetic number, because the mean of its divisors is an integer number (31637520).

Almost surely, 2^126505157 is an apocalyptic number.

It is an amenable number.

126505157 is a deficient number, since it is larger than the sum of its proper divisors (44923).

126505157 is an equidigital number, since it uses as much as digits as its factorization.

126505157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44922.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 126505157 is about 11247.4511334791. The cubic root of 126505157 is about 501.9988743540.

The spelling of 126505157 in words is "one hundred twenty-six million, five hundred five thousand, one hundred fifty-seven".