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1010021491 is a prime number
BaseRepresentation
bin111100001100111…
…011010001110011
32121101112102000101
4330030323101303
54032031141431
6244120133231
734013020033
oct7414732163
92541472011
101010021491
11479149106
12242307217
1313133876b
14981d98c3
155da10961
hex3c33b473

1010021491 has 2 divisors, whose sum is σ = 1010021492. Its totient is φ = 1010021490.

The previous prime is 1010021489. The next prime is 1010021497. The reversal of 1010021491 is 1941200101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1010021491 - 21 = 1010021489 is a prime.

Together with 1010021489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1010021497) by changing a digit.

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 as a sum of consecutive naturals, namely, 505010745 + 505010746.

It is an arithmetic number, because the mean of its divisors is an integer number (505010746).

Almost surely, 21010021491 is an apocalyptic number.

1010021491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010021491 is an equidigital number, since it uses as much as digits as its factorization.

1010021491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1010021491 is about 31780.8352785134. The cubic root of 1010021491 is about 1003.3293997950.

Adding to 1010021491 its reverse (1941200101), we get a palindrome (2951221592).

The spelling of 1010021491 in words is "one billion, ten million, twenty-one thousand, four hundred ninety-one".