1281429479 has 8 divisors (see below), whose sum is σ = 1427666688. Its totient is φ = 1140149560.

The previous prime is 1281429469. The next prime is 1281429497. The reversal of 1281429479 is 9749241821.

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

It is not a de Polignac number, because 1281429479 - 2⁸ = 1281429223 is a prime.

It is a super-2 number, since 2×1281429479² = 3284123019300422882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281429419) 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, 1238777 + ... + 1239810.

It is an arithmetic number, because the mean of its divisors is an integer number (178458336).

Almost surely, 2^1281429479 is an apocalyptic number.

1281429479 is a deficient number, since it is larger than the sum of its proper divisors (146237209).

1281429479 is a wasteful number, since it uses less digits than its factorization.

1281429479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478645.

The product of its digits is 290304, while the sum is 47.

The square root of 1281429479 is about 35797.0596418197. The cubic root of 1281429479 is about 1086.1710840787.

The spelling of 1281429479 in words is "one billion, two hundred eighty-one million, four hundred twenty-nine thousand, four hundred seventy-nine".