1142312421 has 4 divisors (see below), whose sum is σ = 1523083232. Its totient is φ = 761541612.

The previous prime is 1142312417. The next prime is 1142312453. The reversal of 1142312421 is 1242132411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1142312421 - 2² = 1142312417 is a prime.

It is a super-3 number, since 3×1142312421³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142312401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190385401 + ... + 190385406.

It is an arithmetic number, because the mean of its divisors is an integer number (380770808).

Almost surely, 2^1142312421 is an apocalyptic number.

It is an amenable number.

1142312421 is a deficient number, since it is larger than the sum of its proper divisors (380770811).

1142312421 is an equidigital number, since it uses as much as digits as its factorization.

1142312421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380770810.

The product of its digits is 384, while the sum is 21.

The square root of 1142312421 is about 33798.1126839946. The cubic root of 1142312421 is about 1045.3497821014.

Adding to 1142312421 its reverse (1242132411), we get a palindrome (2384444832).

The spelling of 1142312421 in words is "one billion, one hundred forty-two million, three hundred twelve thousand, four hundred twenty-one".