126720490 has 16 divisors (see below), whose sum is σ = 245643048. Its totient is φ = 46789056.

The previous prime is 126720469. The next prime is 126720491. The reversal of 126720490 is 94027621.

It can be written as a sum of positive squares in 4 ways, for example, as 94264681 + 32455809 = 9709^2 + 5697^2 .

It is not an unprimeable number, because it can be changed into a prime (126720491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487257 + ... + 487516.

Almost surely, 2^126720490 is an apocalyptic number.

126720490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126720490 is a deficient number, since it is larger than the sum of its proper divisors (118922558).

126720490 is a wasteful number, since it uses less digits than its factorization.

126720490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974793.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 126720490 is about 11257.0195877950. The cubic root of 126720490 is about 502.2835416647.

The spelling of 126720490 in words is "one hundred twenty-six million, seven hundred twenty thousand, four hundred ninety".