1421042505 has 16 divisors (see below), whose sum is σ = 2274138240. Its totient is φ = 757732608.

The previous prime is 1421042503. The next prime is 1421042507. The reversal of 1421042505 is 5052401241.

It is an interprime number because it is at equal distance from previous prime (1421042503) and next prime (1421042507).

It is not a de Polignac number, because 1421042505 - 2¹ = 1421042503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1421042503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124884 + ... + 135786.

It is an arithmetic number, because the mean of its divisors is an integer number (142133640).

Almost surely, 2^1421042505 is an apocalyptic number.

1421042505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421042505 is a deficient number, since it is larger than the sum of its proper divisors (853095735).

1421042505 is a wasteful number, since it uses less digits than its factorization.

1421042505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19600.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1421042505 is about 37696.7174300363. The cubic root of 1421042505 is about 1124.2658597924.

Adding to 1421042505 its reverse (5052401241), we get a palindrome (6473443746).

The spelling of 1421042505 in words is "one billion, four hundred twenty-one million, forty-two thousand, five hundred five".