1240232021 has 8 divisors (see below), whose sum is σ = 1419725184. Its totient is φ = 1061318160.

The previous prime is 1240232017. The next prime is 1240232023. The reversal of 1240232021 is 1202320421.

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

It is not a de Polignac number, because 1240232021 - 2² = 1240232017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240232023) 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, 140225 + ... + 148806.

It is an arithmetic number, because the mean of its divisors is an integer number (177465648).

Almost surely, 2^1240232021 is an apocalyptic number.

It is an amenable number.

1240232021 is a deficient number, since it is larger than the sum of its proper divisors (179493163).

1240232021 is an equidigital number, since it uses as much as digits as its factorization.

1240232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289651.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1240232021 is about 35216.9280460406. The cubic root of 1240232021 is about 1074.4040745416.

Adding to 1240232021 its reverse (1202320421), we get a palindrome (2442552442).

The spelling of 1240232021 in words is "one billion, two hundred forty million, two hundred thirty-two thousand, twenty-one".