126291130 has 48 divisors (see below), whose sum is σ = 280011816. Its totient is φ = 40750080.

The previous prime is 126291073. The next prime is 126291131. The reversal of 126291130 is 31192621.

It can be written as a sum of positive squares in 4 ways, for example, as 116057529 + 10233601 = 10773^2 + 3199^2 .

It is a junction number, because it is equal to n+sod(n) for n = 126291095 and 126291104.

It is not an unprimeable number, because it can be changed into a prime (126291131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 750 + ... + 15910.

Almost surely, 2^126291130 is an apocalyptic number.

126291130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126291130 is an abundant number, since it is smaller than the sum of its proper divisors (153720686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126291130 is a wasteful number, since it uses less digits than its factorization.

126291130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15199 (or 15192 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 126291130 is about 11237.9326390578. The cubic root of 126291130 is about 501.7156132760.

The spelling of 126291130 in words is "one hundred twenty-six million, two hundred ninety-one thousand, one hundred thirty".