1247952090 has 192 divisors, whose sum is σ = 3857891328. Its totient is φ = 255427200.

The previous prime is 1247952077. The next prime is 1247952107. The reversal of 1247952090 is 902597421.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1147527 + ... + 1148613.

It is an arithmetic number, because the mean of its divisors is an integer number (20093184).

Almost surely, 2^1247952090 is an apocalyptic number.

1247952090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247952090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928945664).

1247952090 is an abundant number, since it is smaller than the sum of its proper divisors (2609939238).

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

1247952090 is a wasteful number, since it uses less digits than its factorization.

1247952090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1247952090 is about 35326.3653663945. The cubic root of 1247952090 is about 1076.6287450127.

The spelling of 1247952090 in words is "one billion, two hundred forty-seven million, nine hundred fifty-two thousand, ninety".