126021146 has 4 divisors (see below), whose sum is σ = 189031722. Its totient is φ = 63010572.

The previous prime is 126021143. The next prime is 126021151. The reversal of 126021146 is 641120621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641120621 = 509 ⋅1259569.

It can be written as a sum of positive squares in only one way, i.e., 81198121 + 44823025 = 9011^2 + 6695^2 .

It is not an unprimeable number, because it can be changed into a prime (126021143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31505285 + ... + 31505288.

Almost surely, 2^126021146 is an apocalyptic number.

126021146 is a deficient number, since it is larger than the sum of its proper divisors (63010576).

126021146 is an equidigital number, since it uses as much as digits as its factorization.

126021146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63010575.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 126021146 is about 11225.9140385093. The cubic root of 126021146 is about 501.3578372182.

Adding to 126021146 its reverse (641120621), we get a palindrome (767141767).

The spelling of 126021146 in words is "one hundred twenty-six million, twenty-one thousand, one hundred forty-six".