1429778481 has 8 divisors (see below), whose sum is σ = 2006706720. Its totient is φ = 903017952.

The previous prime is 1429778479. The next prime is 1429778507. The reversal of 1429778481 is 1848779241.

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

It is not a de Polignac number, because 1429778481 - 2¹ = 1429778479 is a prime.

It is a super-2 number, since 2×1429778481² = 4088533009461334722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1429778401) by changing a digit.

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, 12541860 + ... + 12541973.

It is an arithmetic number, because the mean of its divisors is an integer number (250838340).

Almost surely, 2^1429778481 is an apocalyptic number.

It is an amenable number.

1429778481 is a deficient number, since it is larger than the sum of its proper divisors (576928239).

1429778481 is a wasteful number, since it uses less digits than its factorization.

1429778481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25083855.

The product of its digits is 903168, while the sum is 51.

The square root of 1429778481 is about 37812.4117321284. The cubic root of 1429778481 is about 1126.5649938693.

The spelling of 1429778481 in words is "one billion, four hundred twenty-nine million, seven hundred seventy-eight thousand, four hundred eighty-one".