821490102 has 24 divisors (see below), whose sum is σ = 1793915136. Its totient is φ = 271673136.

The previous prime is 821490101. The next prime is 821490113. The reversal of 821490102 is 201094128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821490101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177393 + ... + 181964.

It is an arithmetic number, because the mean of its divisors is an integer number (74746464).

Almost surely, 2^821490102 is an apocalyptic number.

821490102 is an abundant number, since it is smaller than the sum of its proper divisors (972425034).

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

821490102 is a wasteful number, since it uses less digits than its factorization.

821490102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359492 (or 359489 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 821490102 is about 28661.6486266928. The cubic root of 821490102 is about 936.5567789145.

The spelling of 821490102 in words is "eight hundred twenty-one million, four hundred ninety thousand, one hundred two".