1261054630 has 32 divisors (see below), whose sum is σ = 2536658208. Its totient is φ = 447379200.

The previous prime is 1261054591. The next prime is 1261054631. The reversal of 1261054630 is 364501621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261054631) 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, 135297 + ... + 144316.

It is an arithmetic number, because the mean of its divisors is an integer number (79270569).

Almost surely, 2^1261054630 is an apocalyptic number.

1261054630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261054630 is an abundant number, since it is smaller than the sum of its proper divisors (1275603578).

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

1261054630 is a wasteful number, since it uses less digits than its factorization.

1261054630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279672.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1261054630 is about 35511.3310085668. The cubic root of 1261054630 is about 1080.3835600367.

The spelling of 1261054630 in words is "one billion, two hundred sixty-one million, fifty-four thousand, six hundred thirty".