1261513030 has 16 divisors (see below), whose sum is σ = 2271134880. Its totient is φ = 504513792.

The previous prime is 1261513013. The next prime is 1261513063. The reversal of 1261513030 is 303151621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1261512992 and 1261513010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86422 + ... + 99958.

It is an arithmetic number, because the mean of its divisors is an integer number (141945930).

Almost surely, 2^1261513030 is an apocalyptic number.

1261513030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261513030 is a deficient number, since it is larger than the sum of its proper divisors (1009621850).

1261513030 is a wasteful number, since it uses less digits than its factorization.

1261513030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22863.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1261513030 is about 35517.7847000626. The cubic root of 1261513030 is about 1080.5144525494.

Adding to 1261513030 its reverse (303151621), we get a palindrome (1564664651).

The spelling of 1261513030 in words is "one billion, two hundred sixty-one million, five hundred thirteen thousand, thirty".