740049921 has 48 divisors (see below), whose sum is σ = 1196133120. Its totient is φ = 437978880.

The previous prime is 740049901. The next prime is 740049923. The reversal of 740049921 is 129940047.

It is not a de Polignac number, because 740049921 - 2⁵ = 740049889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (740049923) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 323301 + ... + 325581.

It is an arithmetic number, because the mean of its divisors is an integer number (24919440).

Almost surely, 2^740049921 is an apocalyptic number.

It is an amenable number.

740049921 is a deficient number, since it is larger than the sum of its proper divisors (456083199).

740049921 is a wasteful number, since it uses less digits than its factorization.

740049921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 740049921 is about 27203.8585682252. The cubic root of 740049921 is about 904.5245087219.

Adding to 740049921 its reverse (129940047), we get a palindrome (869989968).

The spelling of 740049921 in words is "seven hundred forty million, forty-nine thousand, nine hundred twenty-one".