1261522471 has 8 divisors (see below), whose sum is σ = 1376489088. Its totient is φ = 1146603000.

The previous prime is 1261522459. The next prime is 1261522489. The reversal of 1261522471 is 1742251621.

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

It is a cyclic number.

It is not a de Polignac number, because 1261522471 - 2⁷ = 1261522343 is a prime.

It is a super-3 number, since 3×1261522471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261522411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67236 + ... + 83926.

It is an arithmetic number, because the mean of its divisors is an integer number (172061136).

Almost surely, 2^1261522471 is an apocalyptic number.

1261522471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1261522471 is a deficient number, since it is larger than the sum of its proper divisors (114966617).

1261522471 is a wasteful number, since it uses less digits than its factorization.

1261522471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23573.

The product of its digits is 6720, while the sum is 31.

The square root of 1261522471 is about 35517.9176050624. The cubic root of 1261522471 is about 1080.5171480194.

The spelling of 1261522471 in words is "one billion, two hundred sixty-one million, five hundred twenty-two thousand, four hundred seventy-one".