1021146690 has 16 divisors (see below), whose sum is σ = 2450752128. Its totient is φ = 272305776.

The previous prime is 1021146673. The next prime is 1021146719. The reversal of 1021146690 is 966411201.

It is a happy number.

It is a super-2 number, since 2×1021146690² = 2085481124995912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 34038223 = 1021146690 / (1 + 0 + 2 + 1 + 1 + 4 + 6 + 6 + 9 + 0).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17019082 + ... + 17019141.

It is an arithmetic number, because the mean of its divisors is an integer number (153172008).

Almost surely, 2^1021146690 is an apocalyptic number.

1021146690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021146690 is an abundant number, since it is smaller than the sum of its proper divisors (1429605438).

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

1021146690 is a wasteful number, since it uses less digits than its factorization.

1021146690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34038233.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1021146690 is about 31955.3859310133. The cubic root of 1021146690 is about 1006.9997853489. Note that the first 3 decimals are identical.

Adding to 1021146690 its reverse (966411201), we get a palindrome (1987557891).

The spelling of 1021146690 in words is "one billion, twenty-one million, one hundred forty-six thousand, six hundred ninety".