1442721129 has 16 divisors (see below), whose sum is σ = 2025676800. Its totient is φ = 910830096.

The previous prime is 1442721101. The next prime is 1442721139. The reversal of 1442721129 is 9211272441.

It is not a de Polignac number, because 1442721129 - 2¹² = 1442717033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1442721129.

It is not an unprimeable number, because it can be changed into a prime (1442721139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283792 + ... + 288830.

It is an arithmetic number, because the mean of its divisors is an integer number (126604800).

Almost surely, 2^1442721129 is an apocalyptic number.

1442721129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1442721129 is a deficient number, since it is larger than the sum of its proper divisors (582955671).

1442721129 is a wasteful number, since it uses less digits than its factorization.

1442721129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10084.

The product of its digits is 8064, while the sum is 33.

The square root of 1442721129 is about 37983.1690226079. The cubic root of 1442721129 is about 1129.9540872044.

The spelling of 1442721129 in words is "one billion, four hundred forty-two million, seven hundred twenty-one thousand, one hundred twenty-nine".