1144655421 has 96 divisors (see below), whose sum is σ = 2029455360. Its totient is φ = 560431872.

The previous prime is 1144655383. The next prime is 1144655429. The reversal of 1144655421 is 1245564411.

It is not a de Polignac number, because 1144655421 - 2⁶ = 1144655357 is a prime.

It is a super-3 number, since 3×1144655421³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144655429) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3020010 + ... + 3020388.

It is an arithmetic number, because the mean of its divisors is an integer number (21140160).

Almost surely, 2^1144655421 is an apocalyptic number.

It is an amenable number.

1144655421 is a deficient number, since it is larger than the sum of its proper divisors (884799939).

1144655421 is a wasteful number, since it uses less digits than its factorization.

1144655421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 462 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 1144655421 is about 33832.7566272688. The cubic root of 1144655421 is about 1046.0640005710.

The spelling of 1144655421 in words is "one billion, one hundred forty-four million, six hundred fifty-five thousand, four hundred twenty-one".