1247126190 has 16 divisors (see below), whose sum is σ = 2993102928. Its totient is φ = 332566976.

The previous prime is 1247126189. The next prime is 1247126197. The reversal of 1247126190 is 916217421.

It is a happy number.

It is a super-2 number, since 2×1247126190² = 3110647467567832200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247126197) 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, 20785407 + ... + 20785466.

It is an arithmetic number, because the mean of its divisors is an integer number (187068933).

Almost surely, 2^1247126190 is an apocalyptic number.

1247126190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1247126190 is an abundant number, since it is smaller than the sum of its proper divisors (1745976738).

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

1247126190 is a wasteful number, since it uses less digits than its factorization.

1247126190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41570883.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1247126190 is about 35314.6738622913. The cubic root of 1247126190 is about 1076.3911867721.

The spelling of 1247126190 in words is "one billion, two hundred forty-seven million, one hundred twenty-six thousand, one hundred ninety".