1290129620 has 24 divisors (see below), whose sum is σ = 2917678344. Its totient is φ = 476355456.

The previous prime is 1290129611. The next prime is 1290129623. The reversal of 1290129620 is 269210921.

It can be written as a sum of positive squares in 4 ways, for example, as 26896 + 1290102724 = 164^2 + 35918^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290129623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2480759 + ... + 2481278.

It is an arithmetic number, because the mean of its divisors is an integer number (121569931).

Almost surely, 2^1290129620 is an apocalyptic number.

1290129620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290129620 is an abundant number, since it is smaller than the sum of its proper divisors (1627548724).

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

1290129620 is a wasteful number, since it uses less digits than its factorization.

1290129620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4962059 (or 4962057 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1290129620 is about 35918.3744064232. The cubic root of 1290129620 is about 1088.6236928719.

The spelling of 1290129620 in words is "one billion, two hundred ninety million, one hundred twenty-nine thousand, six hundred twenty".