1261479284 has 24 divisors (see below), whose sum is σ = 2387374080. Its totient is φ = 579779424.

The previous prime is 1261479281. The next prime is 1261479287. The reversal of 1261479284 is 4829741621.

It is an interprime number because it is at equal distance from previous prime (1261479281) and next prime (1261479287).

It is a super-2 number, since 2×1261479284² = 3182659967922305312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261479281) 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, 38324 + ... + 63179.

It is an arithmetic number, because the mean of its divisors is an integer number (99473920).

Almost surely, 2^1261479284 is an apocalyptic number.

It is an amenable number.

1261479284 is a deficient number, since it is larger than the sum of its proper divisors (1125894796).

1261479284 is a wasteful number, since it uses less digits than its factorization.

1261479284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101759 (or 101757 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 1261479284 is about 35517.3096391041. The cubic root of 1261479284 is about 1080.5048177260.

The spelling of 1261479284 in words is "one billion, two hundred sixty-one million, four hundred seventy-nine thousand, two hundred eighty-four".