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142554521 is a prime number
BaseRepresentation
bin10000111111100…
…11010110011001
3100221020112001002
420133303112121
5242443221041
622051234345
73350456564
oct1037632631
9327215032
10142554521
117351735a
123b8a89b5
13236c2cb5
1414d0b4db
15c7ad59b
hex87f3599

142554521 has 2 divisors, whose sum is σ = 142554522. Its totient is φ = 142554520.

The previous prime is 142554509. The next prime is 142554527. The reversal of 142554521 is 125455241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135606025 + 6948496 = 11645^2 + 2636^2 .

It is a cyclic number.

It is not a de Polignac number, because 142554521 - 210 = 142553497 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142554527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71277260 + 71277261.

It is an arithmetic number, because the mean of its divisors is an integer number (71277261).

Almost surely, 2142554521 is an apocalyptic number.

It is an amenable number.

142554521 is a deficient number, since it is larger than the sum of its proper divisors (1).

142554521 is an equidigital number, since it uses as much as digits as its factorization.

142554521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8000, while the sum is 29.

The square root of 142554521 is about 11939.6198013170. The cubic root of 142554521 is about 522.3885689893.

The spelling of 142554521 in words is "one hundred forty-two million, five hundred fifty-four thousand, five hundred twenty-one".