1021491430 has 8 divisors (see below), whose sum is σ = 1838684592. Its totient is φ = 408596568.

The previous prime is 1021491407. The next prime is 1021491439. The reversal of 1021491430 is 341941201.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1021491395 and 1021491404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021491439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51074562 + ... + 51074581.

It is an arithmetic number, because the mean of its divisors is an integer number (229835574).

Almost surely, 2^1021491430 is an apocalyptic number.

1021491430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021491430 is a deficient number, since it is larger than the sum of its proper divisors (817193162).

1021491430 is a wasteful number, since it uses less digits than its factorization.

1021491430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102149150.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1021491430 is about 31960.7795587029. The cubic root of 1021491430 is about 1007.1130939298.

The spelling of 1021491430 in words is "one billion, twenty-one million, four hundred ninety-one thousand, four hundred thirty".