1021540214 has 8 divisors (see below), whose sum is σ = 1533274608. Its totient is φ = 510448680.

The previous prime is 1021540189. The next prime is 1021540229. The reversal of 1021540214 is 4120451201.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156722 + ... + 163109.

It is an arithmetic number, because the mean of its divisors is an integer number (191659326).

Almost surely, 2^1021540214 is an apocalyptic number.

1021540214 is a deficient number, since it is larger than the sum of its proper divisors (511734394).

1021540214 is a wasteful number, since it uses less digits than its factorization.

1021540214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321430.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1021540214 is about 31961.5427349807. The cubic root of 1021540214 is about 1007.1291261162.

Adding to 1021540214 its reverse (4120451201), we get a palindrome (5141991415).

The spelling of 1021540214 in words is "one billion, twenty-one million, five hundred forty thousand, two hundred fourteen".