1021355340 has 48 divisors (see below), whose sum is σ = 2870471520. Its totient is φ = 271344640.

The previous prime is 1021355333. The next prime is 1021355347. The reversal of 1021355340 is 435531201.

It is an interprime number because it is at equal distance from previous prime (1021355333) and next prime (1021355347).

It is a self number, because there is not a number n which added to its sum of digits gives 1021355340.

It is not an unprimeable number, because it can be changed into a prime (1021355347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15501 + ... + 47780.

It is an arithmetic number, because the mean of its divisors is an integer number (59801490).

Almost surely, 2^1021355340 is an apocalyptic number.

1021355340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021355340 is an abundant number, since it is smaller than the sum of its proper divisors (1849116180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021355340 is a wasteful number, since it uses less digits than its factorization.

1021355340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63562 (or 63560 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1021355340 is about 31958.6504721335. The cubic root of 1021355340 is about 1007.0683671365.

Adding to 1021355340 its reverse (435531201), we get a palindrome (1456886541).

The spelling of 1021355340 in words is "one billion, twenty-one million, three hundred fifty-five thousand, three hundred forty".