1144042421 has 16 divisors (see below), whose sum is σ = 1277645760. Its totient is φ = 1018033920.

The previous prime is 1144042411. The next prime is 1144042429. The reversal of 1144042421 is 1242404411.

It is a cyclic number.

It is not a de Polignac number, because 1144042421 - 2¹⁸ = 1143780277 is a prime.

It is a super-2 number, since 2×1144042421² = 2617666122095082482, 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 (1144042429) 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, 171470 + ... + 178016.

It is an arithmetic number, because the mean of its divisors is an integer number (79852860).

Almost surely, 2^1144042421 is an apocalyptic number.

It is an amenable number.

1144042421 is a deficient number, since it is larger than the sum of its proper divisors (133603339).

1144042421 is a wasteful number, since it uses less digits than its factorization.

1144042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7124.

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

The square root of 1144042421 is about 33823.6961463410. The cubic root of 1144042421 is about 1045.8772335253.

Adding to 1144042421 its reverse (1242404411), we get a palindrome (2386446832).

The spelling of 1144042421 in words is "one billion, one hundred forty-four million, forty-two thousand, four hundred twenty-one".