126261890 has 16 divisors (see below), whose sum is σ = 240640632. Its totient is φ = 47533824.

The previous prime is 126261869. The next prime is 126261917. The reversal of 126261890 is 98162621.

It can be written as a sum of positive squares in 4 ways, for example, as 109014481 + 17247409 = 10441^2 + 4153^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 126261890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371189 + ... + 371528.

Almost surely, 2^126261890 is an apocalyptic number.

126261890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126261890 is a deficient number, since it is larger than the sum of its proper divisors (114378742).

126261890 is a wasteful number, since it uses less digits than its factorization.

126261890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742741.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 126261890 is about 11236.6316127210. The cubic root of 126261890 is about 501.6768897941.

The spelling of 126261890 in words is "one hundred twenty-six million, two hundred sixty-one thousand, eight hundred ninety".