1291429170 has 160 divisors (see below), whose sum is σ = 3597359040. Its totient is φ = 332242560.

The previous prime is 1291429159. The next prime is 1291429171. The reversal of 1291429170 is 719241921.

1291429170 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1291429170² = 3335578602253777800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1291429171) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2914969 + ... + 2915411.

It is an arithmetic number, because the mean of its divisors is an integer number (22483494).

Almost surely, 2^1291429170 is an apocalyptic number.

1291429170 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 1291429170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1798679520).

1291429170 is an abundant number, since it is smaller than the sum of its proper divisors (2305929870).

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

1291429170 is a wasteful number, since it uses less digits than its factorization.

1291429170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1291429170 is about 35936.4601762611. The cubic root of 1291429170 is about 1088.9890944426.

The spelling of 1291429170 in words is "one billion, two hundred ninety-one million, four hundred twenty-nine thousand, one hundred seventy".