1290851964 has 84 divisors (see below), whose sum is σ = 3410815800. Its totient is φ = 427252320.

The previous prime is 1290851957. The next prime is 1290851971. The reversal of 1290851964 is 4691580921.

1290851964 is a `hidden beast` number, since 129 + 0 + 8 + 519 + 6 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1290851957) and next prime (1290851971).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 432999 + ... + 435969.

It is an arithmetic number, because the mean of its divisors is an integer number (40604950).

Almost surely, 2^1290851964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1290851964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1705407900).

1290851964 is an abundant number, since it is smaller than the sum of its proper divisors (2119963836).

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

1290851964 is a wasteful number, since it uses less digits than its factorization.

1290851964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142 (or 3125 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 1290851964 is about 35928.4283541599. The cubic root of 1290851964 is about 1088.8268285530.

The spelling of 1290851964 in words is "one billion, two hundred ninety million, eight hundred fifty-one thousand, nine hundred sixty-four".