421000744 has 8 divisors (see below), whose sum is σ = 789376410. Its totient is φ = 210500368.

The previous prime is 421000721. The next prime is 421000753. The reversal of 421000744 is 447000124.

It can be written as a sum of positive squares in only one way, i.e., 377835844 + 43164900 = 19438^2 + 6570^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×421000744³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26312539 + ... + 26312554.

Almost surely, 2^421000744 is an apocalyptic number.

It is an amenable number.

421000744 is a deficient number, since it is larger than the sum of its proper divisors (368375666).

421000744 is a wasteful number, since it uses less digits than its factorization.

421000744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52625099 (or 52625095 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 421000744 is about 20518.3026588458. The cubic root of 421000744 is about 749.4815640852.

Adding to 421000744 its reverse (447000124), we get a palindrome (868000868).

The spelling of 421000744 in words is "four hundred twenty-one million, seven hundred forty-four", and thus it is an aban number.