1261069420 has 48 divisors (see below), whose sum is σ = 2854561248. Its totient is φ = 465200640.

The previous prime is 1261069343. The next prime is 1261069421. The reversal of 1261069420 is 249601621.

It is not an unprimeable number, because it can be changed into a prime (1261069421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515400 + ... + 517840.

It is an arithmetic number, because the mean of its divisors is an integer number (59470026).

Almost surely, 2^1261069420 is an apocalyptic number.

1261069420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1261069420 is an abundant number, since it is smaller than the sum of its proper divisors (1593491828).

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

1261069420 is a wasteful number, since it uses less digits than its factorization.

1261069420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450 (or 4448 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1261069420 is about 35511.5392513476. The cubic root of 1261069420 is about 1080.3877836999.

The spelling of 1261069420 in words is "one billion, two hundred sixty-one million, sixty-nine thousand, four hundred twenty".