1232421505 has 32 divisors (see below), whose sum is σ = 1712254464. Its totient is φ = 834118656.

The previous prime is 1232421503. The next prime is 1232421521. The reversal of 1232421505 is 5051242321.

It is not a de Polignac number, because 1232421505 - 2¹ = 1232421503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1232421505.

It is not an unprimeable number, because it can be changed into a prime (1232421503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1253244 + ... + 1254226.

It is an arithmetic number, because the mean of its divisors is an integer number (53507952).

Almost surely, 2^1232421505 is an apocalyptic number.

It is an amenable number.

1232421505 is a deficient number, since it is larger than the sum of its proper divisors (479832959).

1232421505 is a wasteful number, since it uses less digits than its factorization.

1232421505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1232421505 is about 35105.8614051842. The cubic root of 1232421505 is about 1072.1439254228.

Adding to 1232421505 its reverse (5051242321), we get a palindrome (6283663826).

The spelling of 1232421505 in words is "one billion, two hundred thirty-two million, four hundred twenty-one thousand, five hundred five".