1261210534 has 8 divisors (see below), whose sum is σ = 1902268368. Its totient is φ = 627121080.

The previous prime is 1261210529. The next prime is 1261210571. The reversal of 1261210534 is 4350121621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1261210534² = 3181304022145130312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1261210499 and 1261210508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1741642 + ... + 1742365.

It is an arithmetic number, because the mean of its divisors is an integer number (237783546).

Almost surely, 2^1261210534 is an apocalyptic number.

1261210534 is a deficient number, since it is larger than the sum of its proper divisors (641057834).

1261210534 is a wasteful number, since it uses less digits than its factorization.

1261210534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484190.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1261210534 is about 35513.5260710620. The cubic root of 1261210534 is about 1080.4280807560.

The spelling of 1261210534 in words is "one billion, two hundred sixty-one million, two hundred ten thousand, five hundred thirty-four".