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135404521 = 7671032803
BaseRepresentation
bin10000001001000…
…01101111101001
3100102210021002021
420010201233221
5234130421041
621234104441
73232630240
oct1004415751
9312707067
10135404521
116a48346a
123941b121
132208b725
1413da9957
15bd49cd1
hex8121be9

135404521 has 16 divisors (see below), whose sum is σ = 158639104. Its totient is φ = 113178384.

The previous prime is 135404513. The next prime is 135404551. The reversal of 135404521 is 125404531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 135404521 - 23 = 135404513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135404501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46906 + ... + 49708.

It is an arithmetic number, because the mean of its divisors is an integer number (9914944).

Almost surely, 2135404521 is an apocalyptic number.

It is an amenable number.

135404521 is a deficient number, since it is larger than the sum of its proper divisors (23234583).

135404521 is a wasteful number, since it uses less digits than its factorization.

135404521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 135404521 is about 11636.3448298854. The cubic root of 135404521 is about 513.5046591324.

The spelling of 135404521 in words is "one hundred thirty-five million, four hundred four thousand, five hundred twenty-one".

Divisors: 1 7 67 103 469 721 2803 6901 19621 48307 187801 288709 1314607 2020963 19343503 135404521