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30420901 = 79834421
BaseRepresentation
bin111010000001…
…0111110100101
32010020112122001
41310002332211
530241432101
63004005301
7516400450
oct164027645
963215561
1030420901
1116198745
12a230831
1363c1744
14407c497
152a0d901
hex1d02fa5

30420901 has 8 divisors (see below), whose sum is σ = 34809984. Its totient is φ = 26042640.

The previous prime is 30420899. The next prime is 30420917. The reversal of 30420901 is 10902403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30420901 - 21 = 30420899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420961) 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 7 ways as a sum of consecutive naturals, for example, 4671 + ... + 9091.

It is an arithmetic number, because the mean of its divisors is an integer number (4351248).

Almost surely, 230420901 is an apocalyptic number.

It is an amenable number.

30420901 is a deficient number, since it is larger than the sum of its proper divisors (4389083).

30420901 is an equidigital number, since it uses as much as digits as its factorization.

30420901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 30420901 is about 5515.5145725490. The cubic root of 30420901 is about 312.1696596706.

The spelling of 30420901 in words is "thirty million, four hundred twenty thousand, nine hundred one".

Divisors: 1 7 983 4421 6881 30947 4345843 30420901