1007540421 has 8 divisors (see below), whose sum is σ = 1344490560. Its totient is φ = 671141952.

The previous prime is 1007540399. The next prime is 1007540449. The reversal of 1007540421 is 1240457001.

1007540421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1007540421 - 2⁶ = 1007540357 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1007540391 and 1007540400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1007540221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133636 + ... + 140973.

It is an arithmetic number, because the mean of its divisors is an integer number (168061320).

Almost surely, 2^1007540421 is an apocalyptic number.

It is an amenable number.

1007540421 is a deficient number, since it is larger than the sum of its proper divisors (336950139).

1007540421 is a wasteful number, since it uses less digits than its factorization.

1007540421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275835.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 1007540421 is about 31741.7772186751. Note that the first 3 decimals coincide. The cubic root of 1007540421 is about 1002.5071824495.

Adding to 1007540421 its reverse (1240457001), we get a palindrome (2247997422).

The spelling of 1007540421 in words is "one billion, seven million, five hundred forty thousand, four hundred twenty-one".