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145380041 = 179812179
BaseRepresentation
bin10001010101001…
…01001011001001
3101010120001220222
420222211023021
5244204130131
622231555425
73413465342
oct1052451311
9333501828
10145380041
11750771a4
124082bb75
13241720c1
14154450c9
15cb6a87b
hex8aa52c9

145380041 has 4 divisors (see below), whose sum is σ = 146192400. Its totient is φ = 144567684.

The previous prime is 145380023. The next prime is 145380083. The reversal of 145380041 is 140083541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 140083541 = 1310775657.

It is a cyclic number.

It is not a de Polignac number, because 145380041 - 226 = 78271177 is a prime.

It is a super-2 number, since 2×1453800412 = 42270712642323362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145380091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405911 + ... + 406268.

It is an arithmetic number, because the mean of its divisors is an integer number (36548100).

Almost surely, 2145380041 is an apocalyptic number.

It is an amenable number.

145380041 is a deficient number, since it is larger than the sum of its proper divisors (812359).

145380041 is an equidigital number, since it uses as much as digits as its factorization.

145380041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812358.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 145380041 is about 12057.3645959637. The cubic root of 145380041 is about 525.8173704673.

The spelling of 145380041 in words is "one hundred forty-five million, three hundred eighty thousand, forty-one".

Divisors: 1 179 812179 145380041