1290771612 has 180 divisors, whose sum is σ = 3855510120. Its totient is φ = 373294656.

The previous prime is 1290771577. The next prime is 1290771613. The reversal of 1290771612 is 2161770921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290771613) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 10163493 + ... + 10163619.

Almost surely, 2^1290771612 is an apocalyptic number.

1290771612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1290771612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1927755060).

1290771612 is an abundant number, since it is smaller than the sum of its proper divisors (2564738508).

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

1290771612 is a wasteful number, since it uses less digits than its factorization.

1290771612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 1290771612 is about 35927.3101136169. The cubic root of 1290771612 is about 1088.8042359214.

The spelling of 1290771612 in words is "one billion, two hundred ninety million, seven hundred seventy-one thousand, six hundred twelve".