1261423130 has 32 divisors (see below), whose sum is σ = 2529688320. Its totient is φ = 448937920.

The previous prime is 1261423073. The next prime is 1261423147. The reversal of 1261423130 is 313241621.

It is a junction number, because it is equal to n+sod(n) for n = 1261423096 and 1261423105.

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, 116825 + ... + 127164.

It is an arithmetic number, because the mean of its divisors is an integer number (79052760).

Almost surely, 2^1261423130 is an apocalyptic number.

1261423130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261423130 is an abundant number, since it is smaller than the sum of its proper divisors (1268265190).

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

1261423130 is a wasteful number, since it uses less digits than its factorization.

1261423130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244054.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1261423130 is about 35516.5191143502. The cubic root of 1261423130 is about 1080.4887848116.

Adding to 1261423130 its reverse (313241621), we get a palindrome (1574664751).

The spelling of 1261423130 in words is "one billion, two hundred sixty-one million, four hundred twenty-three thousand, one hundred thirty".