921434130 has 56 divisors (see below), whose sum is σ = 2486754252. Its totient is φ = 245713824.

The previous prime is 921434113. The next prime is 921434191. The reversal of 921434130 is 31434129.

It can be written as a sum of positive squares in 2 ways, for example, as 880486929 + 40947201 = 29673^2 + 6399^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 921434094 and 921434103.

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 27 ways as a sum of consecutive naturals, for example, 55909 + ... + 70488.

Almost surely, 2^921434130 is an apocalyptic number.

921434130 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

921434130 is an abundant number, since it is smaller than the sum of its proper divisors (1565320122).

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

921434130 is a wasteful number, since it uses less digits than its factorization.

921434130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126422 (or 126407 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 921434130 is about 30355.1335032478. The cubic root of 921434130 is about 973.0939329853.

Adding to 921434130 its reverse (31434129), we get a palindrome (952868259).

The spelling of 921434130 in words is "nine hundred twenty-one million, four hundred thirty-four thousand, one hundred thirty".