102621492 has 120 divisors (see below), whose sum is σ = 286868736. Its totient is φ = 31914432.

The previous prime is 102621487. The next prime is 102621499. The reversal of 102621492 is 294126201.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102621499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 350098 + ... + 350390.

Almost surely, 2^102621492 is an apocalyptic number.

102621492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102621492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143434368).

102621492 is an abundant number, since it is smaller than the sum of its proper divisors (184247244).

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

102621492 is a wasteful number, since it uses less digits than its factorization.

102621492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 102621492 is about 10130.2266509689. The cubic root of 102621492 is about 468.1799111049.

Adding to 102621492 its reverse (294126201), we get a palindrome (396747693).

The spelling of 102621492 in words is "one hundred two million, six hundred twenty-one thousand, four hundred ninety-two".