1290226520 has 64 divisors (see below), whose sum is σ = 3198385440. Its totient is φ = 464512000.

The previous prime is 1290226493. The next prime is 1290226579. The reversal of 1290226520 is 256220921.

It is a super-2 number, since 2×1290226520² = 3329368945822620800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29924 + ... + 58956.

Almost surely, 2^1290226520 is an apocalyptic number.

1290226520 is a gapful number since it is divisible by the number (10) 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 1290226520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599192720).

1290226520 is an abundant number, since it is smaller than the sum of its proper divisors (1908158920).

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

1290226520 is a wasteful number, since it uses less digits than its factorization.

1290226520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29156 (or 29152 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1290226520 is about 35919.7232728761. The cubic root of 1290226520 is about 1088.6509472380.

The spelling of 1290226520 in words is "one billion, two hundred ninety million, two hundred twenty-six thousand, five hundred twenty".