126520151 has 4 divisors (see below), whose sum is σ = 126660552. Its totient is φ = 126379752.

The previous prime is 126520129. The next prime is 126520189. The reversal of 126520151 is 151025621.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126520151 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 (126520351) 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, 68840 + ... + 70653.

It is an arithmetic number, because the mean of its divisors is an integer number (31665138).

Almost surely, 2^126520151 is an apocalyptic number.

126520151 is a deficient number, since it is larger than the sum of its proper divisors (140401).

126520151 is an equidigital number, since it uses as much as digits as its factorization.

126520151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140400.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 126520151 is about 11248.1176647473. The cubic root of 126520151 is about 502.0187066779.

Adding to 126520151 its reverse (151025621), we get a palindrome (277545772).

The spelling of 126520151 in words is "one hundred twenty-six million, five hundred twenty thousand, one hundred fifty-one".