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145270138 = 21347532243
BaseRepresentation
bin10001010100010…
…10010101111010
3101010100111011111
420222022111322
5244142121023
622225350534
73412530046
oct1052122572
9333314144
10145270138
1175001672
124079844a
1324134080
1415417026
15cb4800d
hex8a8a57a

145270138 has 32 divisors (see below), whose sum is σ = 244290816. Its totient is φ = 64354368.

The previous prime is 145270133. The next prime is 145270159. The reversal of 145270138 is 831072541.

It is a super-2 number, since 2×1452701382 = 42206825989078088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145270133) 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 15 ways as a sum of consecutive naturals, for example, 63645 + ... + 65887.

It is an arithmetic number, because the mean of its divisors is an integer number (7634088).

Almost surely, 2145270138 is an apocalyptic number.

145270138 is a deficient number, since it is larger than the sum of its proper divisors (99020678).

145270138 is a wasteful number, since it uses less digits than its factorization.

145270138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 145270138 is about 12052.8062292563. The cubic root of 145270138 is about 525.6848362844.

The spelling of 145270138 in words is "one hundred forty-five million, two hundred seventy thousand, one hundred thirty-eight".

Divisors: 1 2 13 26 47 53 94 106 611 689 1222 1378 2243 2491 4486 4982 29159 32383 58318 64766 105421 118879 210842 237758 1370473 1545427 2740946 3090854 5587313 11174626 72635069 145270138