1142404421 has 4 divisors (see below), whose sum is σ = 1145282412. Its totient is φ = 1139526432.

The previous prime is 1142404399. The next prime is 1142404451. The reversal of 1142404421 is 1244042411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1244042411 = 5179 ⋅240209.

It can be written as a sum of positive squares in 2 ways, for example, as 724201921 + 418202500 = 26911^2 + 20450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142404421 - 2¹⁸ = 1142142277 is a prime.

It is a super-2 number, since 2×1142404421² = 2610175722240690482, which contains 22 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 (1142404451) 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, 1438400 + ... + 1439193.

It is an arithmetic number, because the mean of its divisors is an integer number (286320603).

Almost surely, 2^1142404421 is an apocalyptic number.

It is an amenable number.

1142404421 is a deficient number, since it is larger than the sum of its proper divisors (2877991).

1142404421 is an equidigital number, since it uses as much as digits as its factorization.

1142404421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877990.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1142404421 is about 33799.4736793341. The cubic root of 1142404421 is about 1045.3778449432.

Adding to 1142404421 its reverse (1244042411), we get a palindrome (2386446832).

The spelling of 1142404421 in words is "one billion, one hundred forty-two million, four hundred four thousand, four hundred twenty-one".