1281494970 has 96 divisors (see below), whose sum is σ = 3815690112. Its totient is φ = 292311936.

The previous prime is 1281494873. The next prime is 1281494971. The reversal of 1281494970 is 794941821.

It is a happy number.

1281494970 is a `hidden beast` number, since 12 + 8 + 149 + 497 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1281494971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 352884 + ... + 356496.

It is an arithmetic number, because the mean of its divisors is an integer number (39746772).

Almost surely, 2^1281494970 is an apocalyptic number.

1281494970 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 1281494970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1907845056).

1281494970 is an abundant number, since it is smaller than the sum of its proper divisors (2534195142).

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

1281494970 is a wasteful number, since it uses less digits than its factorization.

1281494970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196 (or 4193 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1281494970 is about 35797.9743840346. The cubic root of 1281494970 is about 1086.1895876899.

The spelling of 1281494970 in words is "one billion, two hundred eighty-one million, four hundred ninety-four thousand, nine hundred seventy".